/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:41:17,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:41:17,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:41:17,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 03:41:17,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 03:41:17,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 03:41:17,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 03:41:17,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 03:41:17,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 03:41:17,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 03:41:17,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 03:41:17,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 03:41:17,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 03:41:17,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 03:41:17,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 03:41:17,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 03:41:17,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 03:41:17,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 03:41:17,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 03:41:17,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 03:41:17,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 03:41:17,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 03:41:17,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 03:41:17,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 03:41:17,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-24 03:41:17,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-24 03:41:17,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-24 03:41:17,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-24 03:41:17,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-24 03:41:17,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-24 03:41:17,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-24 03:41:17,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-24 03:41:17,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-24 03:41:17,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-24 03:41:17,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-24 03:41:17,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-24 03:41:17,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-24 03:41:17,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-24 03:41:17,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:41:17,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:41:17,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:41:17,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 03:41:17,786 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:41:17,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:41:17,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:41:17,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:41:17,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:41:17,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:41:17,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:41:17,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:41:17,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:41:17,788 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:41:17,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:41:17,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:41:17,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:41:17,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:41:17,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:41:17,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:41:17,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:41:17,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:41:17,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:41:17,790 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:41:17,790 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:41:17,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:41:17,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:41:17,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:41:17,994 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:41:17,995 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:41:17,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-02-24 03:41:18,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5482b054f/8b7ffed71d474f4d980acaf6dd2900f2/FLAGc2acf3786 [2022-02-24 03:41:18,438 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:41:18,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-02-24 03:41:18,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5482b054f/8b7ffed71d474f4d980acaf6dd2900f2/FLAGc2acf3786 [2022-02-24 03:41:18,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5482b054f/8b7ffed71d474f4d980acaf6dd2900f2 [2022-02-24 03:41:18,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:41:18,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:41:18,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:41:18,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:41:18,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:41:18,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:41:18" (1/1) ... [2022-02-24 03:41:18,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c93ea95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18, skipping insertion in model container [2022-02-24 03:41:18,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:41:18" (1/1) ... [2022-02-24 03:41:18,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:41:18,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:41:18,619 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-02-24 03:41:18,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:41:18,654 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:41:18,665 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-02-24 03:41:18,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:41:18,678 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:41:18,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18 WrapperNode [2022-02-24 03:41:18,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:41:18,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:41:18,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:41:18,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:41:18,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18" (1/1) ... [2022-02-24 03:41:18,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18" (1/1) ... [2022-02-24 03:41:18,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18" (1/1) ... [2022-02-24 03:41:18,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18" (1/1) ... [2022-02-24 03:41:18,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18" (1/1) ... [2022-02-24 03:41:18,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18" (1/1) ... [2022-02-24 03:41:18,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18" (1/1) ... [2022-02-24 03:41:18,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:41:18,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:41:18,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:41:18,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:41:18,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18" (1/1) ... [2022-02-24 03:41:18,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:41:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:41:18,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 03:41:18,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 03:41:18,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:41:18,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:41:18,785 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:41:18,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 03:41:18,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:41:18,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:41:18,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 03:41:18,786 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:41:18,786 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:41:18,786 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:41:18,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:41:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 03:41:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:41:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:41:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:41:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:41:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:41:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:41:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:41:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:41:18,846 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:41:18,848 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:41:18,978 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:41:18,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:41:18,983 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 03:41:18,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:41:18 BoogieIcfgContainer [2022-02-24 03:41:18,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:41:18,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:41:18,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:41:18,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:41:18,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:41:18" (1/3) ... [2022-02-24 03:41:18,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251b8daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:41:18, skipping insertion in model container [2022-02-24 03:41:18,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:18" (2/3) ... [2022-02-24 03:41:18,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251b8daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:41:18, skipping insertion in model container [2022-02-24 03:41:19,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:41:18" (3/3) ... [2022-02-24 03:41:19,001 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.c [2022-02-24 03:41:19,007 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:41:19,007 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:41:19,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:41:19,059 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 03:41:19,059 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:41:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 03:41:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 03:41:19,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:19,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:19,079 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:19,082 INFO L85 PathProgramCache]: Analyzing trace with hash -380103047, now seen corresponding path program 1 times [2022-02-24 03:41:19,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:19,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713935913] [2022-02-24 03:41:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:19,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:19,170 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:41:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:19,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:19,360 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:19,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713935913] [2022-02-24 03:41:19,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [713935913] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:19,363 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:19,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:41:19,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940653740] [2022-02-24 03:41:19,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:19,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 03:41:19,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:19,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 03:41:19,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:41:19,394 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:19,489 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-02-24 03:41:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:41:19,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 03:41:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:19,496 INFO L225 Difference]: With dead ends: 36 [2022-02-24 03:41:19,496 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 03:41:19,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:41:19,502 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:19,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 03:41:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-02-24 03:41:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-02-24 03:41:19,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-02-24 03:41:19,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:19,538 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-02-24 03:41:19,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,538 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-02-24 03:41:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:41:19,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:19,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:19,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:41:19,540 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:19,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:19,541 INFO L85 PathProgramCache]: Analyzing trace with hash 437044508, now seen corresponding path program 1 times [2022-02-24 03:41:19,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:19,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577107590] [2022-02-24 03:41:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:19,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:19,659 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:19,767 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:19,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577107590] [2022-02-24 03:41:19,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1577107590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:19,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:19,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:41:19,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337903833] [2022-02-24 03:41:19,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:19,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:41:19,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:19,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:41:19,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:41:19,770 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:19,841 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-02-24 03:41:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:41:19,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 03:41:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:19,842 INFO L225 Difference]: With dead ends: 24 [2022-02-24 03:41:19,842 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 03:41:19,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:41:19,844 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:19,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 03:41:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-02-24 03:41:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-24 03:41:19,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-02-24 03:41:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:19,849 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-24 03:41:19,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-24 03:41:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:41:19,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:19,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:19,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:41:19,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2082915426, now seen corresponding path program 1 times [2022-02-24 03:41:19,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:19,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953566483] [2022-02-24 03:41:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:19,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:19,890 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:19,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:19,979 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:19,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953566483] [2022-02-24 03:41:19,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [953566483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:19,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:19,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:41:19,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130845353] [2022-02-24 03:41:19,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:19,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:41:19,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:19,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:41:19,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:41:19,982 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:20,077 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-02-24 03:41:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:41:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 03:41:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:20,078 INFO L225 Difference]: With dead ends: 25 [2022-02-24 03:41:20,078 INFO L226 Difference]: Without dead ends: 19 [2022-02-24 03:41:20,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:41:20,079 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:20,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 17 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:20,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-24 03:41:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-02-24 03:41:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-24 03:41:20,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-02-24 03:41:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:20,083 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-24 03:41:20,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,083 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-24 03:41:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 03:41:20,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:20,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:20,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:41:20,084 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:20,085 INFO L85 PathProgramCache]: Analyzing trace with hash -263170305, now seen corresponding path program 2 times [2022-02-24 03:41:20,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:20,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585862104] [2022-02-24 03:41:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:20,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:20,087 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:20,087 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:20,132 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:20,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585862104] [2022-02-24 03:41:20,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [585862104] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:20,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:20,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:41:20,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385555042] [2022-02-24 03:41:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:20,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:41:20,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:20,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:41:20,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:41:20,134 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:20,191 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-02-24 03:41:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:41:20,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 03:41:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:20,192 INFO L225 Difference]: With dead ends: 26 [2022-02-24 03:41:20,192 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:41:20,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:41:20,193 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:20,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:41:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-02-24 03:41:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-02-24 03:41:20,197 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2022-02-24 03:41:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:20,197 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-02-24 03:41:20,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-02-24 03:41:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 03:41:20,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:20,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:20,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:41:20,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1140259874, now seen corresponding path program 3 times [2022-02-24 03:41:20,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:20,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720112192] [2022-02-24 03:41:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:20,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:20,201 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:20,201 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:20,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:20,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720112192] [2022-02-24 03:41:20,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720112192] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:20,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:20,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:41:20,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395356451] [2022-02-24 03:41:20,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:20,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:41:20,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:41:20,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:41:20,252 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:20,330 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-02-24 03:41:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:41:20,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 03:41:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:20,330 INFO L225 Difference]: With dead ends: 28 [2022-02-24 03:41:20,331 INFO L226 Difference]: Without dead ends: 22 [2022-02-24 03:41:20,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:41:20,331 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:20,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-24 03:41:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-02-24 03:41:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-02-24 03:41:20,335 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2022-02-24 03:41:20,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:20,336 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-02-24 03:41:20,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-02-24 03:41:20,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:41:20,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:20,336 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:20,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:41:20,337 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1216930949, now seen corresponding path program 4 times [2022-02-24 03:41:20,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:20,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551202632] [2022-02-24 03:41:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:20,339 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:20,340 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:20,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:20,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551202632] [2022-02-24 03:41:20,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [551202632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:20,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:20,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:41:20,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476710689] [2022-02-24 03:41:20,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:20,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:41:20,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:41:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:41:20,396 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:20,486 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-02-24 03:41:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:41:20,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 03:41:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:20,487 INFO L225 Difference]: With dead ends: 30 [2022-02-24 03:41:20,487 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 03:41:20,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:41:20,488 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:20,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 03:41:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-02-24 03:41:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-02-24 03:41:20,492 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2022-02-24 03:41:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:20,492 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-02-24 03:41:20,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-02-24 03:41:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:41:20,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:20,493 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:20,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:41:20,494 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:20,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1883389992, now seen corresponding path program 5 times [2022-02-24 03:41:20,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:20,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768888495] [2022-02-24 03:41:20,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:20,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:20,497 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:20,497 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:20,593 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:20,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768888495] [2022-02-24 03:41:20,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [768888495] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:20,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:20,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:41:20,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311382683] [2022-02-24 03:41:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:20,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:41:20,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:41:20,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:41:20,595 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:20,710 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-02-24 03:41:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:41:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 03:41:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:20,714 INFO L225 Difference]: With dead ends: 32 [2022-02-24 03:41:20,714 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 03:41:20,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:41:20,715 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:20,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 17 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 03:41:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-02-24 03:41:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-02-24 03:41:20,725 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 22 [2022-02-24 03:41:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:20,725 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-02-24 03:41:20,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-02-24 03:41:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 03:41:20,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:20,726 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:20,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:41:20,726 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:20,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1894564085, now seen corresponding path program 6 times [2022-02-24 03:41:20,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:20,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624290080] [2022-02-24 03:41:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:20,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:20,735 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:20,736 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:20,822 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:20,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624290080] [2022-02-24 03:41:20,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [624290080] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:20,822 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:20,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:41:20,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285392694] [2022-02-24 03:41:20,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:20,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:41:20,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:20,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:41:20,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:41:20,824 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:20,972 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-24 03:41:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:41:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 03:41:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:20,973 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:41:20,973 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 03:41:20,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:41:20,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:20,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 21 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 03:41:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-24 03:41:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-02-24 03:41:20,978 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 24 [2022-02-24 03:41:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:20,978 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-02-24 03:41:20,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-02-24 03:41:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 03:41:20,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:20,979 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:20,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:41:20,979 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:20,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1033900334, now seen corresponding path program 7 times [2022-02-24 03:41:20,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:20,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415706296] [2022-02-24 03:41:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:20,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:20,982 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:20,982 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:21,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:21,072 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:21,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415706296] [2022-02-24 03:41:21,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [415706296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:21,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:21,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:41:21,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093614889] [2022-02-24 03:41:21,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:21,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:41:21,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:21,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:41:21,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:41:21,074 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:21,243 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-02-24 03:41:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:41:21,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 03:41:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:21,245 INFO L225 Difference]: With dead ends: 36 [2022-02-24 03:41:21,245 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 03:41:21,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:41:21,246 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:21,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 17 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 03:41:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-02-24 03:41:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-02-24 03:41:21,268 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 26 [2022-02-24 03:41:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:21,268 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-02-24 03:41:21,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-02-24 03:41:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 03:41:21,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:21,269 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:21,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:41:21,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2084628113, now seen corresponding path program 8 times [2022-02-24 03:41:21,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:21,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190645823] [2022-02-24 03:41:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:21,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:21,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:21,273 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:21,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:21,408 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:21,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190645823] [2022-02-24 03:41:21,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [190645823] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:21,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:21,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:41:21,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023597367] [2022-02-24 03:41:21,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:21,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:41:21,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:41:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:41:21,410 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:21,604 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-02-24 03:41:21,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:41:21,605 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 03:41:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:21,605 INFO L225 Difference]: With dead ends: 38 [2022-02-24 03:41:21,605 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 03:41:21,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:41:21,606 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:21,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 03:41:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-02-24 03:41:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-02-24 03:41:21,612 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 28 [2022-02-24 03:41:21,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:21,612 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-02-24 03:41:21,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-02-24 03:41:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 03:41:21,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:21,613 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:21,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:41:21,613 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:21,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1778258124, now seen corresponding path program 9 times [2022-02-24 03:41:21,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:21,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549850752] [2022-02-24 03:41:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:21,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:21,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:21,639 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:21,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:21,759 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:21,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549850752] [2022-02-24 03:41:21,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549850752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:21,759 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:21,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:41:21,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406718508] [2022-02-24 03:41:21,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:21,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:41:21,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:21,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:41:21,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:41:21,760 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:21,976 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-02-24 03:41:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:41:21,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 03:41:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:21,977 INFO L225 Difference]: With dead ends: 40 [2022-02-24 03:41:21,977 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 03:41:21,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:41:21,977 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:21,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 03:41:21,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-02-24 03:41:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-02-24 03:41:21,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 30 [2022-02-24 03:41:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:21,984 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-02-24 03:41:21,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-02-24 03:41:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:41:21,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:21,985 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:21,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:41:21,985 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:21,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1134779159, now seen corresponding path program 10 times [2022-02-24 03:41:21,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:21,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369228855] [2022-02-24 03:41:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:21,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:21,988 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:21,988 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:22,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:22,100 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:22,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369228855] [2022-02-24 03:41:22,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369228855] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:22,101 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:22,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:41:22,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404923564] [2022-02-24 03:41:22,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:22,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:41:22,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:41:22,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:41:22,102 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:22,331 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-02-24 03:41:22,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:41:22,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 03:41:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:22,334 INFO L225 Difference]: With dead ends: 42 [2022-02-24 03:41:22,335 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 03:41:22,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:41:22,335 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:22,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:22,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 03:41:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-02-24 03:41:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-02-24 03:41:22,341 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 32 [2022-02-24 03:41:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:22,341 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-02-24 03:41:22,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-02-24 03:41:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:41:22,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:22,342 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:22,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:41:22,342 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash 244931130, now seen corresponding path program 11 times [2022-02-24 03:41:22,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:22,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786619174] [2022-02-24 03:41:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:22,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:22,345 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:22,345 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:22,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:22,474 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:22,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786619174] [2022-02-24 03:41:22,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [786619174] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:22,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:22,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:41:22,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329164180] [2022-02-24 03:41:22,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:22,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:41:22,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:22,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:41:22,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:41:22,475 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:22,728 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2022-02-24 03:41:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:41:22,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 03:41:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:22,729 INFO L225 Difference]: With dead ends: 44 [2022-02-24 03:41:22,729 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 03:41:22,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:41:22,730 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:22,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 03:41:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-02-24 03:41:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-02-24 03:41:22,736 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 34 [2022-02-24 03:41:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:22,736 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-02-24 03:41:22,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-02-24 03:41:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 03:41:22,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:22,737 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:22,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:41:22,737 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:22,738 INFO L85 PathProgramCache]: Analyzing trace with hash -200532835, now seen corresponding path program 12 times [2022-02-24 03:41:22,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:22,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845316640] [2022-02-24 03:41:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:22,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:22,740 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:22,740 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:22,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:22,889 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:22,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845316640] [2022-02-24 03:41:22,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [845316640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:22,889 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:22,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:41:22,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120974778] [2022-02-24 03:41:22,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:22,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:41:22,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:22,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:41:22,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:41:22,890 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:23,176 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-02-24 03:41:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:41:23,177 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 03:41:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:23,177 INFO L225 Difference]: With dead ends: 46 [2022-02-24 03:41:23,177 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 03:41:23,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:41:23,178 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:23,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 17 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 03:41:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-02-24 03:41:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-02-24 03:41:23,184 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 36 [2022-02-24 03:41:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:23,184 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-02-24 03:41:23,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-02-24 03:41:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 03:41:23,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:23,185 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:23,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:41:23,185 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1205326400, now seen corresponding path program 13 times [2022-02-24 03:41:23,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:23,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342542702] [2022-02-24 03:41:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:23,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:23,188 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:23,188 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:23,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:23,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:23,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342542702] [2022-02-24 03:41:23,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342542702] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:23,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:23,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:41:23,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782833394] [2022-02-24 03:41:23,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:23,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:41:23,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:41:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:41:23,362 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:23,679 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2022-02-24 03:41:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 03:41:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 03:41:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:23,680 INFO L225 Difference]: With dead ends: 48 [2022-02-24 03:41:23,680 INFO L226 Difference]: Without dead ends: 42 [2022-02-24 03:41:23,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:41:23,681 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:23,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:23,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-24 03:41:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-02-24 03:41:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-02-24 03:41:23,687 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 38 [2022-02-24 03:41:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:23,687 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-02-24 03:41:23,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-02-24 03:41:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 03:41:23,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:23,687 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:23,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:41:23,688 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:23,688 INFO L85 PathProgramCache]: Analyzing trace with hash -678647005, now seen corresponding path program 14 times [2022-02-24 03:41:23,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:23,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204012372] [2022-02-24 03:41:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:23,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:23,690 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:23,690 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:23,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:23,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:23,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204012372] [2022-02-24 03:41:23,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [204012372] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:23,902 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:23,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:41:23,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897098733] [2022-02-24 03:41:23,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:23,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:41:23,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:23,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:41:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:41:23,903 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:24,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:24,306 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2022-02-24 03:41:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:41:24,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 03:41:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:24,307 INFO L225 Difference]: With dead ends: 50 [2022-02-24 03:41:24,308 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 03:41:24,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:41:24,309 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:24,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 03:41:24,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-02-24 03:41:24,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2022-02-24 03:41:24,316 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 40 [2022-02-24 03:41:24,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:24,317 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2022-02-24 03:41:24,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2022-02-24 03:41:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 03:41:24,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:24,317 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:24,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:41:24,318 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:24,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:24,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1299109702, now seen corresponding path program 15 times [2022-02-24 03:41:24,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:24,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808294174] [2022-02-24 03:41:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:24,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:24,320 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:24,320 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:24,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:24,530 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:24,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808294174] [2022-02-24 03:41:24,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1808294174] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:24,530 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:24,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:41:24,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002788490] [2022-02-24 03:41:24,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:24,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:41:24,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:24,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:41:24,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:41:24,531 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:24,902 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-02-24 03:41:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:41:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 03:41:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:24,903 INFO L225 Difference]: With dead ends: 52 [2022-02-24 03:41:24,903 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 03:41:24,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:41:24,904 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:24,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 03:41:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-02-24 03:41:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2022-02-24 03:41:24,911 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 42 [2022-02-24 03:41:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:24,911 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2022-02-24 03:41:24,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2022-02-24 03:41:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:41:24,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:24,911 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:24,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:41:24,912 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash -747206999, now seen corresponding path program 16 times [2022-02-24 03:41:24,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:24,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558655026] [2022-02-24 03:41:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:24,914 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:24,914 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:25,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:25,166 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:25,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558655026] [2022-02-24 03:41:25,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [558655026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:25,166 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:25,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:41:25,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205353134] [2022-02-24 03:41:25,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:25,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:41:25,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:25,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:41:25,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:41:25,167 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:25,629 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2022-02-24 03:41:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:41:25,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 03:41:25,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:25,630 INFO L225 Difference]: With dead ends: 54 [2022-02-24 03:41:25,630 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 03:41:25,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:41:25,632 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:25,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 03:41:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-02-24 03:41:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-02-24 03:41:25,644 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 44 [2022-02-24 03:41:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:25,644 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-02-24 03:41:25,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-02-24 03:41:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 03:41:25,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:25,645 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:25,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:41:25,645 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:25,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:25,645 INFO L85 PathProgramCache]: Analyzing trace with hash -162535092, now seen corresponding path program 17 times [2022-02-24 03:41:25,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:25,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105782387] [2022-02-24 03:41:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:25,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:25,648 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:25,648 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:25,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:25,923 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:25,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105782387] [2022-02-24 03:41:25,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [105782387] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:25,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:25,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:41:25,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45667883] [2022-02-24 03:41:25,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:25,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 03:41:25,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:25,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 03:41:25,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:41:25,924 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:26,436 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2022-02-24 03:41:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:41:26,436 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 03:41:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:26,437 INFO L225 Difference]: With dead ends: 56 [2022-02-24 03:41:26,437 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 03:41:26,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:41:26,438 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:26,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:26,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 03:41:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-02-24 03:41:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-02-24 03:41:26,444 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 46 [2022-02-24 03:41:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:26,445 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-02-24 03:41:26,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-02-24 03:41:26,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 03:41:26,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:26,445 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:26,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:41:26,445 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:26,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:26,446 INFO L85 PathProgramCache]: Analyzing trace with hash -933548241, now seen corresponding path program 18 times [2022-02-24 03:41:26,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:26,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981319876] [2022-02-24 03:41:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:26,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:26,448 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:26,448 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:26,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:26,746 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:26,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981319876] [2022-02-24 03:41:26,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [981319876] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:26,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:26,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 03:41:26,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224827840] [2022-02-24 03:41:26,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:26,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:41:26,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:26,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:41:26,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:41:26,749 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:27,357 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-02-24 03:41:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:41:27,357 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 03:41:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:27,358 INFO L225 Difference]: With dead ends: 58 [2022-02-24 03:41:27,358 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 03:41:27,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 03:41:27,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:27,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 03:41:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-02-24 03:41:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-02-24 03:41:27,385 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 48 [2022-02-24 03:41:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:27,385 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-02-24 03:41:27,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:27,386 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-02-24 03:41:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 03:41:27,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:27,387 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:27,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:41:27,387 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:27,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:27,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1152157778, now seen corresponding path program 19 times [2022-02-24 03:41:27,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:27,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642300162] [2022-02-24 03:41:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:27,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:27,389 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:27,389 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:27,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:27,726 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 03:41:27,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:27,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642300162] [2022-02-24 03:41:27,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [642300162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:27,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:27,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:41:27,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613524310] [2022-02-24 03:41:27,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:27,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:41:27,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:27,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:41:27,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:41:27,727 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:28,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:28,343 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2022-02-24 03:41:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:41:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 03:41:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:28,344 INFO L225 Difference]: With dead ends: 60 [2022-02-24 03:41:28,344 INFO L226 Difference]: Without dead ends: 54 [2022-02-24 03:41:28,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:41:28,346 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:28,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-24 03:41:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-02-24 03:41:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-02-24 03:41:28,353 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 50 [2022-02-24 03:41:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:28,353 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-02-24 03:41:28,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:28,354 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-02-24 03:41:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 03:41:28,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:28,354 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:28,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:41:28,354 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:28,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:28,354 INFO L85 PathProgramCache]: Analyzing trace with hash -234085195, now seen corresponding path program 20 times [2022-02-24 03:41:28,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:28,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786503984] [2022-02-24 03:41:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:28,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:28,357 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:28,357 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:28,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:28,749 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:28,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786503984] [2022-02-24 03:41:28,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [786503984] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:28,749 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:28,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:41:28,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236929401] [2022-02-24 03:41:28,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:28,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 03:41:28,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:28,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 03:41:28,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:41:28,750 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:29,426 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2022-02-24 03:41:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 03:41:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 03:41:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:29,427 INFO L225 Difference]: With dead ends: 62 [2022-02-24 03:41:29,427 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 03:41:29,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 03:41:29,428 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:29,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 03:41:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-02-24 03:41:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2022-02-24 03:41:29,437 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 52 [2022-02-24 03:41:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:29,437 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2022-02-24 03:41:29,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2022-02-24 03:41:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 03:41:29,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:29,437 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:29,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:41:29,438 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:29,438 INFO L85 PathProgramCache]: Analyzing trace with hash -973720488, now seen corresponding path program 21 times [2022-02-24 03:41:29,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:29,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883905404] [2022-02-24 03:41:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:29,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:29,441 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:29,441 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:29,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:29,922 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:29,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883905404] [2022-02-24 03:41:29,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1883905404] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:29,922 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:29,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 03:41:29,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427148133] [2022-02-24 03:41:29,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:29,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 03:41:29,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:29,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 03:41:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:41:29,923 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:30,702 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2022-02-24 03:41:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:41:30,703 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 03:41:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:30,703 INFO L225 Difference]: With dead ends: 64 [2022-02-24 03:41:30,704 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 03:41:30,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 03:41:30,705 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:30,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 03:41:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-02-24 03:41:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-02-24 03:41:30,713 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 54 [2022-02-24 03:41:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:30,713 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-02-24 03:41:30,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-02-24 03:41:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 03:41:30,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:30,714 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:30,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:41:30,714 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1201334075, now seen corresponding path program 22 times [2022-02-24 03:41:30,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:30,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91579851] [2022-02-24 03:41:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:30,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:30,716 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:30,716 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:31,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:31,226 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:31,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91579851] [2022-02-24 03:41:31,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [91579851] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:31,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:31,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 03:41:31,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271689792] [2022-02-24 03:41:31,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:31,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:41:31,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:41:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:41:31,227 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:32,120 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-02-24 03:41:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:41:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 03:41:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:32,121 INFO L225 Difference]: With dead ends: 66 [2022-02-24 03:41:32,121 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 03:41:32,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:41:32,122 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:32,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 03:41:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-02-24 03:41:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2022-02-24 03:41:32,131 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 56 [2022-02-24 03:41:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:32,131 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2022-02-24 03:41:32,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2022-02-24 03:41:32,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 03:41:32,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:32,132 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:32,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:41:32,132 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash -220304034, now seen corresponding path program 23 times [2022-02-24 03:41:32,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:32,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736144664] [2022-02-24 03:41:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:32,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:32,134 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:32,134 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:32,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:32,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:32,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736144664] [2022-02-24 03:41:32,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736144664] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:32,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:32,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:41:32,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962746593] [2022-02-24 03:41:32,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:32,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 03:41:32,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 03:41:32,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:41:32,720 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:33,736 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2022-02-24 03:41:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:41:33,737 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 03:41:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:33,737 INFO L225 Difference]: With dead ends: 68 [2022-02-24 03:41:33,738 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 03:41:33,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 03:41:33,739 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:33,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 25 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 03:41:33,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-02-24 03:41:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2022-02-24 03:41:33,748 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 58 [2022-02-24 03:41:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:33,748 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2022-02-24 03:41:33,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2022-02-24 03:41:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 03:41:33,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:33,749 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:33,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:41:33,749 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash -614926655, now seen corresponding path program 24 times [2022-02-24 03:41:33,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:33,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567472342] [2022-02-24 03:41:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:33,752 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:33,752 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:34,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:34,435 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:34,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567472342] [2022-02-24 03:41:34,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567472342] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:34,435 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:34,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 03:41:34,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512087636] [2022-02-24 03:41:34,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:34,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:41:34,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:34,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:41:34,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:41:34,437 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:35,564 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2022-02-24 03:41:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 03:41:35,565 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 03:41:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:35,565 INFO L225 Difference]: With dead ends: 70 [2022-02-24 03:41:35,565 INFO L226 Difference]: Without dead ends: 64 [2022-02-24 03:41:35,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 03:41:35,567 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:35,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-24 03:41:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-02-24 03:41:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-02-24 03:41:35,576 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 60 [2022-02-24 03:41:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:35,576 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-02-24 03:41:35,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-02-24 03:41:35,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 03:41:35,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:35,577 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:35,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:41:35,577 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1890143388, now seen corresponding path program 25 times [2022-02-24 03:41:35,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:35,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260475456] [2022-02-24 03:41:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:35,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:35,579 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:35,579 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:36,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:36,371 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:36,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260475456] [2022-02-24 03:41:36,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1260475456] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:36,371 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:36,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:41:36,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092640099] [2022-02-24 03:41:36,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:36,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 03:41:36,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:36,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 03:41:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:41:36,372 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:37,544 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2022-02-24 03:41:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 03:41:37,544 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 03:41:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:37,545 INFO L225 Difference]: With dead ends: 72 [2022-02-24 03:41:37,545 INFO L226 Difference]: Without dead ends: 66 [2022-02-24 03:41:37,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:41:37,546 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:37,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-24 03:41:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-02-24 03:41:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-02-24 03:41:37,557 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 62 [2022-02-24 03:41:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:37,557 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-02-24 03:41:37,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-02-24 03:41:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 03:41:37,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:37,558 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:37,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:41:37,558 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:37,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 987222855, now seen corresponding path program 26 times [2022-02-24 03:41:37,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:37,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236031020] [2022-02-24 03:41:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:37,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:37,560 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:37,560 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:38,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:38,430 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:38,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236031020] [2022-02-24 03:41:38,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236031020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:38,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:38,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 03:41:38,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574177283] [2022-02-24 03:41:38,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:38,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 03:41:38,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:38,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 03:41:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:41:38,431 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:40,011 INFO L93 Difference]: Finished difference Result 74 states and 102 transitions. [2022-02-24 03:41:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 03:41:40,012 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 03:41:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:40,012 INFO L225 Difference]: With dead ends: 74 [2022-02-24 03:41:40,012 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 03:41:40,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 03:41:40,014 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:40,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 17 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:41:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 03:41:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-02-24 03:41:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2022-02-24 03:41:40,044 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 64 [2022-02-24 03:41:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:40,045 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2022-02-24 03:41:40,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:40,060 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2022-02-24 03:41:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 03:41:40,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:40,061 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:40,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:41:40,061 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:40,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:40,061 INFO L85 PathProgramCache]: Analyzing trace with hash 177243754, now seen corresponding path program 27 times [2022-02-24 03:41:40,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:40,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160276284] [2022-02-24 03:41:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:40,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:40,064 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:40,064 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:41,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:41,092 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:41,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160276284] [2022-02-24 03:41:41,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [160276284] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:41,093 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:41,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 03:41:41,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492769021] [2022-02-24 03:41:41,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:41,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 03:41:41,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 03:41:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:41:41,094 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:42,776 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2022-02-24 03:41:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:41:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 03:41:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:42,777 INFO L225 Difference]: With dead ends: 76 [2022-02-24 03:41:42,777 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 03:41:42,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 03:41:42,778 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:42,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 17 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:41:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 03:41:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-02-24 03:41:42,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2022-02-24 03:41:42,789 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 66 [2022-02-24 03:41:42,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:42,790 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2022-02-24 03:41:42,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2022-02-24 03:41:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 03:41:42,790 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:42,790 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:42,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:41:42,790 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:42,791 INFO L85 PathProgramCache]: Analyzing trace with hash -823591731, now seen corresponding path program 28 times [2022-02-24 03:41:42,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:42,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533926989] [2022-02-24 03:41:42,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:42,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:42,793 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:42,793 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:43,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:43,900 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:43,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533926989] [2022-02-24 03:41:43,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [533926989] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:43,900 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:43,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 03:41:43,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425676466] [2022-02-24 03:41:43,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:43,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:41:43,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:43,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:41:43,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:41:43,901 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:45,890 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2022-02-24 03:41:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 03:41:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 03:41:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:45,892 INFO L225 Difference]: With dead ends: 78 [2022-02-24 03:41:45,892 INFO L226 Difference]: Without dead ends: 72 [2022-02-24 03:41:45,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 03:41:45,894 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:45,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:41:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-24 03:41:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-02-24 03:41:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-02-24 03:41:45,909 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 68 [2022-02-24 03:41:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:45,909 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-02-24 03:41:45,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-02-24 03:41:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 03:41:45,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:45,910 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:45,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:41:45,910 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:45,910 INFO L85 PathProgramCache]: Analyzing trace with hash -553818512, now seen corresponding path program 29 times [2022-02-24 03:41:45,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:45,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973754431] [2022-02-24 03:41:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:45,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:45,914 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:45,914 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:47,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:47,285 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:47,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973754431] [2022-02-24 03:41:47,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [973754431] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:47,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:47,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:41:47,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687463844] [2022-02-24 03:41:47,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:47,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 03:41:47,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 03:41:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:41:47,287 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:49,516 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2022-02-24 03:41:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 03:41:49,517 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 03:41:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:49,517 INFO L225 Difference]: With dead ends: 80 [2022-02-24 03:41:49,517 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 03:41:49,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 03:41:49,518 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:49,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:41:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 03:41:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-02-24 03:41:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2022-02-24 03:41:49,531 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 70 [2022-02-24 03:41:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:49,531 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2022-02-24 03:41:49,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:49,531 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2022-02-24 03:41:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 03:41:49,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:49,531 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:49,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:41:49,532 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1000207187, now seen corresponding path program 30 times [2022-02-24 03:41:49,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:49,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348793658] [2022-02-24 03:41:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:49,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:49,534 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:49,534 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:50,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:50,998 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:50,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348793658] [2022-02-24 03:41:50,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [348793658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:50,998 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:50,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 03:41:50,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690229238] [2022-02-24 03:41:50,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:50,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 03:41:50,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 03:41:51,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:41:51,000 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:53,576 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2022-02-24 03:41:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 03:41:53,577 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 03:41:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:53,578 INFO L225 Difference]: With dead ends: 82 [2022-02-24 03:41:53,578 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 03:41:53,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 03:41:53,579 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:53,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:41:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 03:41:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-02-24 03:41:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.457142857142857) internal successors, (102), 70 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2022-02-24 03:41:53,593 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 72 [2022-02-24 03:41:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:53,593 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2022-02-24 03:41:53,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2022-02-24 03:41:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 03:41:53,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:53,594 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:53,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:41:53,594 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:53,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:53,594 INFO L85 PathProgramCache]: Analyzing trace with hash -229715082, now seen corresponding path program 31 times [2022-02-24 03:41:53,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:53,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334063431] [2022-02-24 03:41:53,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:53,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:53,596 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:53,596 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:55,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:55,280 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 03:41:55,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:55,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334063431] [2022-02-24 03:41:55,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [334063431] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:55,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:55,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 03:41:55,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124408801] [2022-02-24 03:41:55,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:55,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 03:41:55,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:55,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 03:41:55,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:41:55,281 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:58,340 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2022-02-24 03:41:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 03:41:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 03:41:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:58,342 INFO L225 Difference]: With dead ends: 84 [2022-02-24 03:41:58,342 INFO L226 Difference]: Without dead ends: 78 [2022-02-24 03:41:58,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:41:58,343 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:58,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:41:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-24 03:41:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-02-24 03:41:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-02-24 03:41:58,357 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 74 [2022-02-24 03:41:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:58,357 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-02-24 03:41:58,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-02-24 03:41:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 03:41:58,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:58,358 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:58,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:41:58,358 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:58,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1069009191, now seen corresponding path program 32 times [2022-02-24 03:41:58,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:58,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640457322] [2022-02-24 03:41:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:58,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:58,362 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:41:58,362 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:00,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:00,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:00,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640457322] [2022-02-24 03:42:00,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [640457322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:00,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:00,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 03:42:00,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105116748] [2022-02-24 03:42:00,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:00,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 03:42:00,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:00,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 03:42:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:42:00,266 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:04,533 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2022-02-24 03:42:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 03:42:04,534 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 03:42:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:04,535 INFO L225 Difference]: With dead ends: 86 [2022-02-24 03:42:04,535 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 03:42:04,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 03:42:04,536 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:04,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 15 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:42:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 03:42:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-02-24 03:42:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-02-24 03:42:04,551 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 76 [2022-02-24 03:42:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:04,551 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-02-24 03:42:04,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-02-24 03:42:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 03:42:04,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:04,552 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:04,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:42:04,552 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:04,552 INFO L85 PathProgramCache]: Analyzing trace with hash -176796292, now seen corresponding path program 33 times [2022-02-24 03:42:04,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:04,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307613902] [2022-02-24 03:42:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:04,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:04,556 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:42:04,556 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:06,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:06,888 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:06,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307613902] [2022-02-24 03:42:06,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [307613902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:06,888 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:06,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 03:42:06,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811991293] [2022-02-24 03:42:06,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:06,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 03:42:06,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 03:42:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:42:06,889 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:11,228 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2022-02-24 03:42:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:42:11,229 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-24 03:42:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:11,230 INFO L225 Difference]: With dead ends: 88 [2022-02-24 03:42:11,230 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 03:42:11,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 03:42:11,231 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:11,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 21 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:42:11,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 03:42:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-02-24 03:42:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2022-02-24 03:42:11,246 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 78 [2022-02-24 03:42:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:11,246 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2022-02-24 03:42:11,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2022-02-24 03:42:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 03:42:11,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:11,247 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:11,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:42:11,247 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1753659553, now seen corresponding path program 34 times [2022-02-24 03:42:11,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:11,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620337257] [2022-02-24 03:42:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:11,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:11,250 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:42:11,250 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:14,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:14,166 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:14,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620337257] [2022-02-24 03:42:14,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1620337257] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:14,166 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:14,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 03:42:14,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206997173] [2022-02-24 03:42:14,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:14,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 03:42:14,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:14,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 03:42:14,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:42:14,167 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:21,267 INFO L93 Difference]: Finished difference Result 90 states and 126 transitions. [2022-02-24 03:42:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 03:42:21,269 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-24 03:42:21,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:21,270 INFO L225 Difference]: With dead ends: 90 [2022-02-24 03:42:21,270 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 03:42:21,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:42:21,271 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:21,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 27 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:42:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 03:42:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-02-24 03:42:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-02-24 03:42:21,309 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 80 [2022-02-24 03:42:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:21,310 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-02-24 03:42:21,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-02-24 03:42:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 03:42:21,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:21,310 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:21,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:42:21,311 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:21,311 INFO L85 PathProgramCache]: Analyzing trace with hash -995797886, now seen corresponding path program 35 times [2022-02-24 03:42:21,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:21,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388787775] [2022-02-24 03:42:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:21,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:21,316 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:42:21,316 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:25,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:25,111 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:25,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388787775] [2022-02-24 03:42:25,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [388787775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:25,111 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:25,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 03:42:25,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270639077] [2022-02-24 03:42:25,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:25,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 03:42:25,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 03:42:25,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:42:25,113 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:34,189 INFO L93 Difference]: Finished difference Result 92 states and 129 transitions. [2022-02-24 03:42:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 03:42:34,190 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-02-24 03:42:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:34,190 INFO L225 Difference]: With dead ends: 92 [2022-02-24 03:42:34,191 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 03:42:34,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=2188, Invalid=3664, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 03:42:34,192 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 126 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:34,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 27 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:42:34,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 03:42:34,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-02-24 03:42:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:34,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-02-24 03:42:34,208 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 82 [2022-02-24 03:42:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:34,208 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-02-24 03:42:34,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-02-24 03:42:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 03:42:34,209 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:34,209 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:34,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:42:34,209 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1459791077, now seen corresponding path program 36 times [2022-02-24 03:42:34,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:34,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171408890] [2022-02-24 03:42:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:34,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:34,212 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:42:34,212 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:39,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:39,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171408890] [2022-02-24 03:42:39,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [171408890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:39,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:39,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 03:42:39,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629509080] [2022-02-24 03:42:39,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:39,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 03:42:39,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 03:42:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:42:39,044 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:51,379 INFO L93 Difference]: Finished difference Result 94 states and 132 transitions. [2022-02-24 03:42:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 03:42:51,382 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-02-24 03:42:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:51,382 INFO L225 Difference]: With dead ends: 94 [2022-02-24 03:42:51,382 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 03:42:51,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=2304, Invalid=3858, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 03:42:51,383 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:51,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 17 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:42:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 03:42:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-02-24 03:42:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-02-24 03:42:51,401 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 84 [2022-02-24 03:42:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:51,401 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-02-24 03:42:51,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-02-24 03:42:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 03:42:51,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:51,402 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:51,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:42:51,402 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:51,403 INFO L85 PathProgramCache]: Analyzing trace with hash -951228280, now seen corresponding path program 37 times [2022-02-24 03:42:51,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:51,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522514138] [2022-02-24 03:42:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:51,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:51,405 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:42:51,405 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:57,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:57,348 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:57,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522514138] [2022-02-24 03:42:57,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [522514138] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:57,348 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:57,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 03:42:57,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224954205] [2022-02-24 03:42:57,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:57,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 03:42:57,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 03:42:57,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:42:57,350 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:17,240 INFO L93 Difference]: Finished difference Result 96 states and 135 transitions. [2022-02-24 03:43:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 03:43:17,245 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-24 03:43:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:17,246 INFO L225 Difference]: With dead ends: 96 [2022-02-24 03:43:17,246 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 03:43:17,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=2423, Invalid=4057, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 03:43:17,247 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 132 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:17,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 21 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:43:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 03:43:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-02-24 03:43:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-02-24 03:43:17,265 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 86 [2022-02-24 03:43:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:17,265 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-02-24 03:43:17,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-02-24 03:43:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 03:43:17,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:17,266 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:17,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:43:17,267 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:17,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1341509483, now seen corresponding path program 38 times [2022-02-24 03:43:17,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:17,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298553216] [2022-02-24 03:43:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:17,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:17,270 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:43:17,270 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:31,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:31,214 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:31,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298553216] [2022-02-24 03:43:31,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [298553216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:31,214 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:31,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 03:43:31,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356855397] [2022-02-24 03:43:31,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:31,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 03:43:31,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:31,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 03:43:31,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 03:43:31,215 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:02,643 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2022-02-24 03:44:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 03:44:02,649 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-02-24 03:44:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:02,649 INFO L225 Difference]: With dead ends: 98 [2022-02-24 03:44:02,649 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 03:44:02,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=2545, Invalid=4261, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 03:44:02,650 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:02,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 17 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:44:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 03:44:02,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-02-24 03:44:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-02-24 03:44:02,669 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 88 [2022-02-24 03:44:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:02,670 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-02-24 03:44:02,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-02-24 03:44:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-24 03:44:02,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:02,670 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:02,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:44:02,671 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:02,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:02,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1344276878, now seen corresponding path program 39 times [2022-02-24 03:44:02,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:02,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752113121] [2022-02-24 03:44:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:02,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:02,673 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:44:02,673 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:44:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:25,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:25,214 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:25,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752113121] [2022-02-24 03:44:25,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [752113121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:25,215 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:25,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 03:44:25,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905608412] [2022-02-24 03:44:25,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:25,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-24 03:44:25,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:25,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-24 03:44:25,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 03:44:25,216 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 44 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:56,081 INFO L93 Difference]: Finished difference Result 100 states and 141 transitions. [2022-02-24 03:44:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 03:44:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-02-24 03:44:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:56,087 INFO L225 Difference]: With dead ends: 100 [2022-02-24 03:44:56,087 INFO L226 Difference]: Without dead ends: 94 [2022-02-24 03:44:56,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=2670, Invalid=4470, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 03:44:56,089 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 138 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:56,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 19 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:44:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-24 03:44:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-02-24 03:44:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2022-02-24 03:44:56,126 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 90 [2022-02-24 03:44:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:56,126 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2022-02-24 03:44:56,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2022-02-24 03:44:56,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 03:44:56,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:56,127 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:56,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:44:56,127 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:56,127 INFO L85 PathProgramCache]: Analyzing trace with hash -291223823, now seen corresponding path program 40 times [2022-02-24 03:44:56,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:56,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124995752] [2022-02-24 03:44:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:56,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:56,146 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:44:56,146 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:44:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:29,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:29,008 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:29,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124995752] [2022-02-24 03:45:29,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2124995752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:29,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:29,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-24 03:45:29,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14560206] [2022-02-24 03:45:29,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:29,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 03:45:29,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 03:45:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:45:29,010 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:12,691 INFO L93 Difference]: Finished difference Result 102 states and 144 transitions. [2022-02-24 03:46:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 03:46:12,697 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-24 03:46:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:12,698 INFO L225 Difference]: With dead ends: 102 [2022-02-24 03:46:12,698 INFO L226 Difference]: Without dead ends: 96 [2022-02-24 03:46:12,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 72.6s TimeCoverageRelationStatistics Valid=2798, Invalid=4684, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 03:46:12,700 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 141 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:12,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 29 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:46:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-24 03:46:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-02-24 03:46:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-02-24 03:46:12,741 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 92 [2022-02-24 03:46:12,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:12,741 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-02-24 03:46:12,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-02-24 03:46:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 03:46:12,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:12,742 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:12,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:46:12,742 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:12,743 INFO L85 PathProgramCache]: Analyzing trace with hash -49367148, now seen corresponding path program 41 times [2022-02-24 03:46:12,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:12,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118232676] [2022-02-24 03:46:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:12,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:12,764 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:46:12,764 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:46:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:48,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:48,896 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:48,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118232676] [2022-02-24 03:46:48,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2118232676] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:48,896 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:48,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 03:46:48,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65404070] [2022-02-24 03:46:48,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:48,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-24 03:46:48,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:48,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-24 03:46:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:46:48,898 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:31,813 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2022-02-24 03:47:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 03:47:31,819 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-02-24 03:47:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:31,820 INFO L225 Difference]: With dead ends: 104 [2022-02-24 03:47:31,820 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 03:47:31,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 75.2s TimeCoverageRelationStatistics Valid=2929, Invalid=4903, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 03:47:31,821 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:31,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 27 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:47:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 03:47:31,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-02-24 03:47:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-02-24 03:47:31,842 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 94 [2022-02-24 03:47:31,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:31,844 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-02-24 03:47:31,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-02-24 03:47:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-24 03:47:31,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:31,845 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:31,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:47:31,845 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 446663543, now seen corresponding path program 42 times [2022-02-24 03:47:31,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:31,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104188151] [2022-02-24 03:47:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:31,848 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:47:31,848 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:47:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:11,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:11,245 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:11,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104188151] [2022-02-24 03:48:11,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [104188151] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:11,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:11,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-24 03:48:11,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456989965] [2022-02-24 03:48:11,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:11,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 03:48:11,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:11,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 03:48:11,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 03:48:11,247 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 47 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:03,331 INFO L93 Difference]: Finished difference Result 106 states and 150 transitions. [2022-02-24 03:49:03,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 03:49:03,338 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-02-24 03:49:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:03,339 INFO L225 Difference]: With dead ends: 106 [2022-02-24 03:49:03,339 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 03:49:03,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 87.5s TimeCoverageRelationStatistics Valid=3063, Invalid=5127, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 03:49:03,340 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 147 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:03,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 21 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 03:49:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 03:49:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-02-24 03:49:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-02-24 03:49:03,366 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 96 [2022-02-24 03:49:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:03,366 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-02-24 03:49:03,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-02-24 03:49:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-24 03:49:03,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:03,367 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:03,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:49:03,367 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:03,367 INFO L85 PathProgramCache]: Analyzing trace with hash 390787738, now seen corresponding path program 43 times [2022-02-24 03:49:03,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:03,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589527913] [2022-02-24 03:49:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:03,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:03,370 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:49:03,370 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:49:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:46,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:46,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:46,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589527913] [2022-02-24 03:49:46,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [589527913] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:46,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:46,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 03:49:46,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647891252] [2022-02-24 03:49:46,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:46,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 03:49:46,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 03:49:46,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:49:46,261 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 48 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:38,162 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2022-02-24 03:50:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 03:50:38,169 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-02-24 03:50:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:38,170 INFO L225 Difference]: With dead ends: 108 [2022-02-24 03:50:38,170 INFO L226 Difference]: Without dead ends: 102 [2022-02-24 03:50:38,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 90.6s TimeCoverageRelationStatistics Valid=3200, Invalid=5356, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 03:50:38,171 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 150 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:38,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 23 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:50:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-24 03:50:38,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-02-24 03:50:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-02-24 03:50:38,195 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 98 [2022-02-24 03:50:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:38,195 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-02-24 03:50:38,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-02-24 03:50:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-24 03:50:38,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:38,195 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:38,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:50:38,196 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:38,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1766253315, now seen corresponding path program 44 times [2022-02-24 03:50:38,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:38,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214403079] [2022-02-24 03:50:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:38,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:38,205 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:50:38,205 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:50:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:19,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:19,894 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:19,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214403079] [2022-02-24 03:51:19,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [214403079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:19,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:19,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 03:51:19,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959320916] [2022-02-24 03:51:19,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:19,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 03:51:19,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:19,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 03:51:19,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 03:51:19,896 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 49 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:16,857 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2022-02-24 03:52:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 03:52:16,865 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-02-24 03:52:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:16,866 INFO L225 Difference]: With dead ends: 110 [2022-02-24 03:52:16,866 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 03:52:16,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 94.2s TimeCoverageRelationStatistics Valid=3340, Invalid=5590, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 03:52:16,867 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:16,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 29 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:52:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 03:52:16,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-02-24 03:52:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-02-24 03:52:16,890 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 100 [2022-02-24 03:52:16,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:16,890 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-02-24 03:52:16,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-02-24 03:52:16,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 03:52:16,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:16,891 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:16,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:52:16,891 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:16,891 INFO L85 PathProgramCache]: Analyzing trace with hash -213501280, now seen corresponding path program 45 times [2022-02-24 03:52:16,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:16,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976885145] [2022-02-24 03:52:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:16,894 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:52:16,894 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:52:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:05,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:05,733 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 03:53:05,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:05,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976885145] [2022-02-24 03:53:05,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1976885145] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:05,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:05,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 03:53:05,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661962042] [2022-02-24 03:53:05,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:05,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-24 03:53:05,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:05,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-24 03:53:05,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:53:05,734 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 50 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:10,834 INFO L93 Difference]: Finished difference Result 112 states and 159 transitions. [2022-02-24 03:54:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 03:54:10,842 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 03:54:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:10,843 INFO L225 Difference]: With dead ends: 112 [2022-02-24 03:54:10,843 INFO L226 Difference]: Without dead ends: 106 [2022-02-24 03:54:10,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 109.1s TimeCoverageRelationStatistics Valid=3483, Invalid=5829, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 03:54:10,844 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 156 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:10,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 25 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 03:54:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-24 03:54:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-02-24 03:54:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-02-24 03:54:10,869 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 102 [2022-02-24 03:54:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:10,869 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-02-24 03:54:10,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-02-24 03:54:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-24 03:54:10,870 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:10,870 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:10,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:54:10,870 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:10,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1627552643, now seen corresponding path program 46 times [2022-02-24 03:54:10,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:10,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874453632] [2022-02-24 03:54:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:10,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:10,872 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-02-24 03:54:10,872 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:54:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:06,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:06,140 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:06,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874453632] [2022-02-24 03:55:06,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874453632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:06,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:06,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-24 03:55:06,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165576149] [2022-02-24 03:55:06,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:06,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 03:55:06,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:06,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 03:55:06,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:55:06,142 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)