/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/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 02:45:14,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 02:45:15,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 02:45:15,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 02:45:15,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 02:45:15,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 02:45:15,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 02:45:15,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 02:45:15,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 02:45:15,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 02:45:15,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 02:45:15,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 02:45:15,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 02:45:15,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 02:45:15,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 02:45:15,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 02:45:15,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 02:45:15,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 02:45:15,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 02:45:15,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 02:45:15,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 02:45:15,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 02:45:15,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 02:45:15,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 02:45:15,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-24 02:45:15,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-24 02:45:15,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-24 02:45:15,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-24 02:45:15,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-24 02:45:15,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-24 02:45:15,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-24 02:45:15,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-24 02:45:15,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-24 02:45:15,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-24 02:45:15,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-24 02:45:15,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-24 02:45:15,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-24 02:45:15,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-24 02:45:15,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 02:45:15,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 02:45:15,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 02:45:15,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 02:45:15,094 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 02:45:15,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 02:45:15,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 02:45:15,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 02:45:15,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 02:45:15,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 02:45:15,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 02:45:15,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 02:45:15,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 02:45:15,096 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 02:45:15,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 02:45:15,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 02:45:15,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 02:45:15,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 02:45:15,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 02:45:15,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:15,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 02:45:15,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 02:45:15,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 02:45:15,098 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 02:45:15,098 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 02:45:15,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 02:45:15,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 02:45:15,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 02:45:15,286 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 02:45:15,286 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 02:45:15,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2022-02-24 02:45:15,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f524b6d10/f9286fe659a643d79fe8911471732732/FLAG0373001f4 [2022-02-24 02:45:15,739 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 02:45:15,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c [2022-02-24 02:45:15,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f524b6d10/f9286fe659a643d79fe8911471732732/FLAG0373001f4 [2022-02-24 02:45:15,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f524b6d10/f9286fe659a643d79fe8911471732732 [2022-02-24 02:45:15,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 02:45:15,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 02:45:15,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:15,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 02:45:15,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 02:45:15,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:15" (1/1) ... [2022-02-24 02:45:15,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ac3c1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:15, skipping insertion in model container [2022-02-24 02:45:15,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:15" (1/1) ... [2022-02-24 02:45:15,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 02:45:15,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 02:45:15,953 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/eureka_01-2.c[323,336] [2022-02-24 02:45:15,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:16,000 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 02:45:16,010 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/eureka_01-2.c[323,336] [2022-02-24 02:45:16,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:16,042 INFO L208 MainTranslator]: Completed translation [2022-02-24 02:45:16,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:16 WrapperNode [2022-02-24 02:45:16,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:16,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 02:45:16,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 02:45:16,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 02:45:16,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:16" (1/1) ... [2022-02-24 02:45:16,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:16" (1/1) ... [2022-02-24 02:45:16,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:16" (1/1) ... [2022-02-24 02:45:16,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:16" (1/1) ... [2022-02-24 02:45:16,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:16" (1/1) ... [2022-02-24 02:45:16,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:16" (1/1) ... [2022-02-24 02:45:16,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:16" (1/1) ... [2022-02-24 02:45:16,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 02:45:16,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 02:45:16,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 02:45:16,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 02:45:16,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:16" (1/1) ... [2022-02-24 02:45:16,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:16,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 02:45:16,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 02:45:16,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 02:45:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 02:45:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 02:45:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 02:45:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 02:45:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 02:45:16,144 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 02:45:16,144 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 02:45:16,144 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 02:45:16,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 02:45:16,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 02:45:16,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 02:45:16,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 02:45:16,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 02:45:16,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 02:45:16,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 02:45:16,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 02:45:16,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 02:45:16,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 02:45:16,219 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 02:45:16,220 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 02:45:16,396 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 02:45:16,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 02:45:16,399 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-02-24 02:45:16,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:16 BoogieIcfgContainer [2022-02-24 02:45:16,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 02:45:16,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 02:45:16,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 02:45:16,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 02:45:16,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 02:45:15" (1/3) ... [2022-02-24 02:45:16,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413d0f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:16, skipping insertion in model container [2022-02-24 02:45:16,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:16" (2/3) ... [2022-02-24 02:45:16,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413d0f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:16, skipping insertion in model container [2022-02-24 02:45:16,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:16" (3/3) ... [2022-02-24 02:45:16,406 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2022-02-24 02:45:16,408 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 02:45:16,409 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 02:45:16,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 02:45:16,439 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 02:45:16,439 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 02:45:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 02:45:16,452 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:16,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:16,453 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:16,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1209894008, now seen corresponding path program 1 times [2022-02-24 02:45:16,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:16,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261033659] [2022-02-24 02:45:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:16,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:16,516 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:45:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:16,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:16,685 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:16,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261033659] [2022-02-24 02:45:16,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [261033659] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:16,687 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:16,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 02:45:16,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835759444] [2022-02-24 02:45:16,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:16,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 02:45:16,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:16,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 02:45:16,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:45:16,717 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:16,762 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2022-02-24 02:45:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 02:45:16,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 02:45:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:16,772 INFO L225 Difference]: With dead ends: 61 [2022-02-24 02:45:16,773 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 02:45:16,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:45:16,778 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:16,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 02:45:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 02:45:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-02-24 02:45:16,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2022-02-24 02:45:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:16,812 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-02-24 02:45:16,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-02-24 02:45:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 02:45:16,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:16,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:16,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 02:45:16,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:16,816 INFO L85 PathProgramCache]: Analyzing trace with hash -286620772, now seen corresponding path program 1 times [2022-02-24 02:45:16,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:16,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306830535] [2022-02-24 02:45:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:16,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:16,823 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:45:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:16,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:16,952 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:16,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306830535] [2022-02-24 02:45:16,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306830535] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:16,953 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:16,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 02:45:16,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467670715] [2022-02-24 02:45:16,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:16,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 02:45:16,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 02:45:16,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 02:45:16,955 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:17,030 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-02-24 02:45:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 02:45:17,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 02:45:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:17,031 INFO L225 Difference]: With dead ends: 54 [2022-02-24 02:45:17,031 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 02:45:17,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:45:17,033 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:17,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 38 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:17,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 02:45:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-02-24 02:45:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-02-24 02:45:17,040 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2022-02-24 02:45:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:17,040 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-02-24 02:45:17,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,041 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-02-24 02:45:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 02:45:17,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:17,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:17,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 02:45:17,042 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:17,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:17,042 INFO L85 PathProgramCache]: Analyzing trace with hash -344225220, now seen corresponding path program 1 times [2022-02-24 02:45:17,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:17,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868068927] [2022-02-24 02:45:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:17,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:17,050 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:17,050 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:17,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:17,117 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:17,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868068927] [2022-02-24 02:45:17,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1868068927] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:17,118 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:17,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:45:17,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583620642] [2022-02-24 02:45:17,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:17,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:45:17,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:17,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:45:17,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:45:17,119 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:17,252 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-02-24 02:45:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:45:17,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 02:45:17,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:17,255 INFO L225 Difference]: With dead ends: 61 [2022-02-24 02:45:17,255 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 02:45:17,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:17,262 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:17,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 02:45:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2022-02-24 02:45:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-02-24 02:45:17,282 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2022-02-24 02:45:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:17,282 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-02-24 02:45:17,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-02-24 02:45:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 02:45:17,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:17,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:17,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 02:45:17,284 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash -522475142, now seen corresponding path program 1 times [2022-02-24 02:45:17,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:17,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653508788] [2022-02-24 02:45:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:17,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:17,287 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:17,287 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:17,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:17,366 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:17,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653508788] [2022-02-24 02:45:17,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [653508788] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:17,367 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:17,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:45:17,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854089202] [2022-02-24 02:45:17,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:17,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:45:17,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:17,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:45:17,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:45:17,370 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:17,455 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-02-24 02:45:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:45:17,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 02:45:17,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:17,457 INFO L225 Difference]: With dead ends: 55 [2022-02-24 02:45:17,457 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 02:45:17,458 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 02:45:17,465 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:17,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 02:45:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-02-24 02:45:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-02-24 02:45:17,477 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2022-02-24 02:45:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:17,477 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-02-24 02:45:17,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-02-24 02:45:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 02:45:17,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:17,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:17,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 02:45:17,478 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1086024003, now seen corresponding path program 1 times [2022-02-24 02:45:17,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:17,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28741508] [2022-02-24 02:45:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:17,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:17,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:17,481 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:17,565 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:17,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28741508] [2022-02-24 02:45:17,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [28741508] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:17,565 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:17,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:45:17,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229824997] [2022-02-24 02:45:17,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:17,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:45:17,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:17,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:45:17,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:45:17,567 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:17,660 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-02-24 02:45:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:45:17,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 02:45:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:17,661 INFO L225 Difference]: With dead ends: 58 [2022-02-24 02:45:17,661 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 02:45:17,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:17,662 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:17,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 29 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 02:45:17,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2022-02-24 02:45:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-02-24 02:45:17,675 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2022-02-24 02:45:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:17,679 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-02-24 02:45:17,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-02-24 02:45:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 02:45:17,680 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:17,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:17,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 02:45:17,681 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:17,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash -669976079, now seen corresponding path program 1 times [2022-02-24 02:45:17,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:17,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367098133] [2022-02-24 02:45:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:17,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:17,684 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:17,684 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:17,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:17,763 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:17,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367098133] [2022-02-24 02:45:17,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1367098133] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:17,763 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:17,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:45:17,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304450280] [2022-02-24 02:45:17,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:17,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:45:17,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:45:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:45:17,765 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:17,825 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-02-24 02:45:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:45:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 02:45:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:17,829 INFO L225 Difference]: With dead ends: 63 [2022-02-24 02:45:17,829 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 02:45:17,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:17,831 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:17,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 38 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 02:45:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-02-24 02:45:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-02-24 02:45:17,841 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2022-02-24 02:45:17,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:17,841 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-02-24 02:45:17,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-02-24 02:45:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 02:45:17,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:17,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:17,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 02:45:17,843 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:17,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1490218863, now seen corresponding path program 2 times [2022-02-24 02:45:17,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:17,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247955238] [2022-02-24 02:45:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:17,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:17,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:17,847 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:17,903 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:17,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247955238] [2022-02-24 02:45:17,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [247955238] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:17,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:17,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:45:17,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898427599] [2022-02-24 02:45:17,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:17,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:45:17,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:17,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:45:17,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:45:17,905 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:17,968 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-02-24 02:45:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:45:17,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 02:45:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:17,969 INFO L225 Difference]: With dead ends: 68 [2022-02-24 02:45:17,969 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 02:45:17,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:17,970 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:17,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 43 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 02:45:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-02-24 02:45:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-02-24 02:45:17,977 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 32 [2022-02-24 02:45:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:17,978 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-02-24 02:45:17,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-02-24 02:45:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 02:45:17,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:17,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:17,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 02:45:17,980 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:17,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1271364145, now seen corresponding path program 1 times [2022-02-24 02:45:17,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:17,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581524914] [2022-02-24 02:45:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:17,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:17,984 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:17,985 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:18,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:18,053 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:18,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581524914] [2022-02-24 02:45:18,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1581524914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:18,054 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:18,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:45:18,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930453792] [2022-02-24 02:45:18,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:18,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:45:18,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:45:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:45:18,058 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:18,138 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-02-24 02:45:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 02:45:18,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 02:45:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:18,140 INFO L225 Difference]: With dead ends: 66 [2022-02-24 02:45:18,140 INFO L226 Difference]: Without dead ends: 42 [2022-02-24 02:45:18,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:18,142 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:18,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 43 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:18,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-24 02:45:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-02-24 02:45:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-02-24 02:45:18,156 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 32 [2022-02-24 02:45:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:18,156 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-02-24 02:45:18,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-02-24 02:45:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 02:45:18,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:18,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:18,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 02:45:18,160 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:18,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1161465843, now seen corresponding path program 2 times [2022-02-24 02:45:18,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:18,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865981425] [2022-02-24 02:45:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:18,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:18,166 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:18,166 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:18,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:18,259 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 02:45:18,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:18,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865981425] [2022-02-24 02:45:18,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [865981425] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:18,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:18,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:45:18,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770197414] [2022-02-24 02:45:18,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:18,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:45:18,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:18,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:45:18,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:18,260 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:18,373 INFO L93 Difference]: Finished difference Result 93 states and 113 transitions. [2022-02-24 02:45:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 02:45:18,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-24 02:45:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:18,374 INFO L225 Difference]: With dead ends: 93 [2022-02-24 02:45:18,374 INFO L226 Difference]: Without dead ends: 69 [2022-02-24 02:45:18,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:45:18,375 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 165 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:18,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 34 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-24 02:45:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2022-02-24 02:45:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-02-24 02:45:18,381 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 35 [2022-02-24 02:45:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:18,381 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-02-24 02:45:18,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-02-24 02:45:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 02:45:18,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:18,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:18,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 02:45:18,382 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash -36852214, now seen corresponding path program 3 times [2022-02-24 02:45:18,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:18,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448595293] [2022-02-24 02:45:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:18,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:18,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:18,385 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:18,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:18,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:18,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448595293] [2022-02-24 02:45:18,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448595293] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:18,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:18,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:45:18,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972799200] [2022-02-24 02:45:18,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:18,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:45:18,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:18,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:45:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:18,470 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:18,552 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2022-02-24 02:45:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 02:45:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:18,553 INFO L225 Difference]: With dead ends: 86 [2022-02-24 02:45:18,553 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 02:45:18,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:18,554 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:18,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 43 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 02:45:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2022-02-24 02:45:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-02-24 02:45:18,568 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 41 [2022-02-24 02:45:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:18,568 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-02-24 02:45:18,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-02-24 02:45:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 02:45:18,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:18,569 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:18,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 02:45:18,569 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1479881626, now seen corresponding path program 4 times [2022-02-24 02:45:18,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:18,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756824707] [2022-02-24 02:45:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:18,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:18,573 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:18,573 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:18,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:18,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:18,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756824707] [2022-02-24 02:45:18,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [756824707] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:18,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:18,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:45:18,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999381921] [2022-02-24 02:45:18,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:18,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:45:18,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:18,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:45:18,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:45:18,665 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:18,822 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2022-02-24 02:45:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:18,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 02:45:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:18,825 INFO L225 Difference]: With dead ends: 119 [2022-02-24 02:45:18,825 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 02:45:18,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:45:18,828 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 242 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:18,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 34 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 02:45:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 55. [2022-02-24 02:45:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-02-24 02:45:18,837 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 44 [2022-02-24 02:45:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:18,837 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-02-24 02:45:18,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-02-24 02:45:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 02:45:18,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:18,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:18,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 02:45:18,838 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:18,838 INFO L85 PathProgramCache]: Analyzing trace with hash 861610113, now seen corresponding path program 5 times [2022-02-24 02:45:18,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:18,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588525606] [2022-02-24 02:45:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:18,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:18,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:18,841 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:18,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:18,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:18,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588525606] [2022-02-24 02:45:18,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588525606] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:18,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:18,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:45:18,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927217599] [2022-02-24 02:45:18,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:18,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:45:18,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:45:18,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:45:18,929 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:19,035 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2022-02-24 02:45:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:45:19,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 02:45:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:19,036 INFO L225 Difference]: With dead ends: 111 [2022-02-24 02:45:19,036 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 02:45:19,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:45:19,037 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:19,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 02:45:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2022-02-24 02:45:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-02-24 02:45:19,044 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 50 [2022-02-24 02:45:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:19,044 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-02-24 02:45:19,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-02-24 02:45:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 02:45:19,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:19,044 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:19,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 02:45:19,045 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash -609982043, now seen corresponding path program 6 times [2022-02-24 02:45:19,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:19,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139922867] [2022-02-24 02:45:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:19,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:19,048 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:19,048 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:19,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:19,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139922867] [2022-02-24 02:45:19,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [139922867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:19,131 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:19,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:19,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659572897] [2022-02-24 02:45:19,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:19,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:19,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:19,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:19,132 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:19,313 INFO L93 Difference]: Finished difference Result 145 states and 181 transitions. [2022-02-24 02:45:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:45:19,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-24 02:45:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:19,314 INFO L225 Difference]: With dead ends: 145 [2022-02-24 02:45:19,314 INFO L226 Difference]: Without dead ends: 109 [2022-02-24 02:45:19,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:45:19,317 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 283 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:19,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 39 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:19,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-24 02:45:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 64. [2022-02-24 02:45:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-02-24 02:45:19,347 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 53 [2022-02-24 02:45:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:19,347 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-02-24 02:45:19,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:19,347 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-02-24 02:45:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 02:45:19,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:19,348 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:19,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 02:45:19,348 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:19,348 INFO L85 PathProgramCache]: Analyzing trace with hash -485292356, now seen corresponding path program 7 times [2022-02-24 02:45:19,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:19,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006729661] [2022-02-24 02:45:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:19,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:19,351 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:19,351 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:19,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:19,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:19,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006729661] [2022-02-24 02:45:19,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006729661] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:19,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:19,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:45:19,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143647150] [2022-02-24 02:45:19,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:19,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:45:19,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:45:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:45:19,402 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:19,462 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2022-02-24 02:45:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 02:45:19,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 02:45:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:19,463 INFO L225 Difference]: With dead ends: 120 [2022-02-24 02:45:19,463 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 02:45:19,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:19,464 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 65 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:19,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 40 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 02:45:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-02-24 02:45:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2022-02-24 02:45:19,475 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 59 [2022-02-24 02:45:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:19,476 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2022-02-24 02:45:19,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2022-02-24 02:45:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:45:19,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:19,476 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:19,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 02:45:19,476 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1739025752, now seen corresponding path program 8 times [2022-02-24 02:45:19,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:19,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574111920] [2022-02-24 02:45:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:19,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:19,480 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:19,480 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:19,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:19,559 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:19,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574111920] [2022-02-24 02:45:19,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574111920] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:19,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:19,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:45:19,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676939754] [2022-02-24 02:45:19,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:19,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:45:19,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:45:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:19,560 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:19,651 INFO L93 Difference]: Finished difference Result 141 states and 182 transitions. [2022-02-24 02:45:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:19,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-24 02:45:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:19,652 INFO L225 Difference]: With dead ends: 141 [2022-02-24 02:45:19,652 INFO L226 Difference]: Without dead ends: 96 [2022-02-24 02:45:19,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 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 02:45:19,655 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:19,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 50 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-24 02:45:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-02-24 02:45:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 82 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2022-02-24 02:45:19,669 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 71 [2022-02-24 02:45:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:19,669 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2022-02-24 02:45:19,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2022-02-24 02:45:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:45:19,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:19,670 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:19,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 02:45:19,670 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1979638852, now seen corresponding path program 9 times [2022-02-24 02:45:19,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:19,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288183511] [2022-02-24 02:45:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:19,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:19,674 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:19,674 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:19,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:19,775 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:19,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288183511] [2022-02-24 02:45:19,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288183511] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:19,775 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:19,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:45:19,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662249645] [2022-02-24 02:45:19,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:19,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:45:19,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:45:19,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:45:19,776 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:19,900 INFO L93 Difference]: Finished difference Result 162 states and 210 transitions. [2022-02-24 02:45:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:45:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-24 02:45:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:19,901 INFO L225 Difference]: With dead ends: 162 [2022-02-24 02:45:19,901 INFO L226 Difference]: Without dead ends: 108 [2022-02-24 02:45:19,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:45:19,902 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:19,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 55 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-24 02:45:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-02-24 02:45:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.2872340425531914) internal successors, (121), 94 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-02-24 02:45:19,918 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 83 [2022-02-24 02:45:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:19,918 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-02-24 02:45:19,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-02-24 02:45:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-24 02:45:19,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:19,922 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:19,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 02:45:19,922 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1805248600, now seen corresponding path program 10 times [2022-02-24 02:45:19,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:19,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093044675] [2022-02-24 02:45:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:19,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:19,926 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:19,926 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:20,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:20,030 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:20,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093044675] [2022-02-24 02:45:20,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1093044675] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:20,030 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:20,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:20,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52759064] [2022-02-24 02:45:20,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:20,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:20,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:20,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:20,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:20,031 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:20,152 INFO L93 Difference]: Finished difference Result 183 states and 238 transitions. [2022-02-24 02:45:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:45:20,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-24 02:45:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:20,153 INFO L225 Difference]: With dead ends: 183 [2022-02-24 02:45:20,153 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 02:45:20,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:45:20,153 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 93 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:20,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 35 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 02:45:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2022-02-24 02:45:20,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.2924528301886793) internal successors, (137), 106 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 142 transitions. [2022-02-24 02:45:20,169 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 142 transitions. Word has length 95 [2022-02-24 02:45:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:20,169 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 142 transitions. [2022-02-24 02:45:20,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 142 transitions. [2022-02-24 02:45:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-24 02:45:20,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:20,170 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:20,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 02:45:20,170 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1784966980, now seen corresponding path program 11 times [2022-02-24 02:45:20,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:20,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459888444] [2022-02-24 02:45:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:20,173 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:20,173 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:20,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:20,272 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:20,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459888444] [2022-02-24 02:45:20,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [459888444] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:20,272 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:20,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:45:20,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151369061] [2022-02-24 02:45:20,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:20,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:45:20,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:20,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:45:20,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:45:20,273 INFO L87 Difference]: Start difference. First operand 112 states and 142 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:20,400 INFO L93 Difference]: Finished difference Result 204 states and 266 transitions. [2022-02-24 02:45:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:45:20,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-02-24 02:45:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:20,401 INFO L225 Difference]: With dead ends: 204 [2022-02-24 02:45:20,401 INFO L226 Difference]: Without dead ends: 132 [2022-02-24 02:45:20,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:45:20,402 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:20,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 45 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-24 02:45:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-02-24 02:45:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.2966101694915255) internal successors, (153), 118 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-02-24 02:45:20,420 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 107 [2022-02-24 02:45:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:20,420 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-02-24 02:45:20,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-02-24 02:45:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-24 02:45:20,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:20,421 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:20,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 02:45:20,421 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:20,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:20,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1408793768, now seen corresponding path program 12 times [2022-02-24 02:45:20,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:20,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613404660] [2022-02-24 02:45:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:20,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:20,424 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:20,424 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:20,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:20,536 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:20,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613404660] [2022-02-24 02:45:20,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [613404660] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:20,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:20,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:45:20,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226036119] [2022-02-24 02:45:20,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:20,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:45:20,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:20,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:45:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:20,537 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:20,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:20,714 INFO L93 Difference]: Finished difference Result 225 states and 294 transitions. [2022-02-24 02:45:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:45:20,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-02-24 02:45:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:20,715 INFO L225 Difference]: With dead ends: 225 [2022-02-24 02:45:20,715 INFO L226 Difference]: Without dead ends: 144 [2022-02-24 02:45:20,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 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 02:45:20,716 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:20,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 45 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-24 02:45:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2022-02-24 02:45:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.3) internal successors, (169), 130 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 174 transitions. [2022-02-24 02:45:20,741 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 174 transitions. Word has length 119 [2022-02-24 02:45:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:20,742 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 174 transitions. [2022-02-24 02:45:20,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 174 transitions. [2022-02-24 02:45:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-02-24 02:45:20,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:20,743 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:20,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 02:45:20,743 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:20,743 INFO L85 PathProgramCache]: Analyzing trace with hash 162686396, now seen corresponding path program 13 times [2022-02-24 02:45:20,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:20,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725884789] [2022-02-24 02:45:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:20,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:20,746 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:20,746 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:20,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:20,844 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:20,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725884789] [2022-02-24 02:45:20,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725884789] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:20,845 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:20,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:45:20,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133852883] [2022-02-24 02:45:20,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:20,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:45:20,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:45:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:45:20,846 INFO L87 Difference]: Start difference. First operand 136 states and 174 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:21,045 INFO L93 Difference]: Finished difference Result 246 states and 322 transitions. [2022-02-24 02:45:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:45:21,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-02-24 02:45:21,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:21,046 INFO L225 Difference]: With dead ends: 246 [2022-02-24 02:45:21,046 INFO L226 Difference]: Without dead ends: 156 [2022-02-24 02:45:21,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:45:21,047 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:21,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 50 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:21,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-24 02:45:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2022-02-24 02:45:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.3028169014084507) internal successors, (185), 142 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 190 transitions. [2022-02-24 02:45:21,070 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 190 transitions. Word has length 131 [2022-02-24 02:45:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:21,070 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 190 transitions. [2022-02-24 02:45:21,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 190 transitions. [2022-02-24 02:45:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-24 02:45:21,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:21,071 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:21,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 02:45:21,071 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash -631226792, now seen corresponding path program 14 times [2022-02-24 02:45:21,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:21,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982140438] [2022-02-24 02:45:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:21,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:21,074 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:21,074 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:21,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:21,239 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:21,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982140438] [2022-02-24 02:45:21,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [982140438] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:21,239 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:21,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:45:21,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224518513] [2022-02-24 02:45:21,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:21,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:45:21,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:21,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:45:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:45:21,240 INFO L87 Difference]: Start difference. First operand 148 states and 190 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:21,483 INFO L93 Difference]: Finished difference Result 267 states and 350 transitions. [2022-02-24 02:45:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:45:21,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-02-24 02:45:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:21,484 INFO L225 Difference]: With dead ends: 267 [2022-02-24 02:45:21,484 INFO L226 Difference]: Without dead ends: 168 [2022-02-24 02:45:21,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 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 02:45:21,485 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:21,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 55 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-24 02:45:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2022-02-24 02:45:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3051948051948052) internal successors, (201), 154 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 206 transitions. [2022-02-24 02:45:21,520 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 206 transitions. Word has length 143 [2022-02-24 02:45:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:21,520 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 206 transitions. [2022-02-24 02:45:21,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 206 transitions. [2022-02-24 02:45:21,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-24 02:45:21,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:21,521 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:21,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 02:45:21,522 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1544919740, now seen corresponding path program 15 times [2022-02-24 02:45:21,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:21,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473723429] [2022-02-24 02:45:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:21,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:21,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:21,526 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:21,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:21,675 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:21,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473723429] [2022-02-24 02:45:21,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [473723429] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:21,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:21,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:45:21,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324153884] [2022-02-24 02:45:21,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:21,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:45:21,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:21,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:45:21,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:45:21,677 INFO L87 Difference]: Start difference. First operand 160 states and 206 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:21,999 INFO L93 Difference]: Finished difference Result 288 states and 378 transitions. [2022-02-24 02:45:21,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:45:22,000 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-02-24 02:45:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:22,001 INFO L225 Difference]: With dead ends: 288 [2022-02-24 02:45:22,001 INFO L226 Difference]: Without dead ends: 180 [2022-02-24 02:45:22,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 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 02:45:22,003 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 147 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:22,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 55 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-24 02:45:22,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2022-02-24 02:45:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.3072289156626506) internal successors, (217), 166 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 222 transitions. [2022-02-24 02:45:22,066 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 222 transitions. Word has length 155 [2022-02-24 02:45:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:22,067 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 222 transitions. [2022-02-24 02:45:22,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 222 transitions. [2022-02-24 02:45:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-02-24 02:45:22,068 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:22,068 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:22,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 02:45:22,069 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:22,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:22,069 INFO L85 PathProgramCache]: Analyzing trace with hash -703325864, now seen corresponding path program 16 times [2022-02-24 02:45:22,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:22,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906279792] [2022-02-24 02:45:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:22,078 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:22,078 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:22,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:22,255 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:22,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906279792] [2022-02-24 02:45:22,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [906279792] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:22,256 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:22,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:45:22,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194331500] [2022-02-24 02:45:22,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:22,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:45:22,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:45:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:45:22,257 INFO L87 Difference]: Start difference. First operand 172 states and 222 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:22,512 INFO L93 Difference]: Finished difference Result 309 states and 406 transitions. [2022-02-24 02:45:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:45:22,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-02-24 02:45:22,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:22,513 INFO L225 Difference]: With dead ends: 309 [2022-02-24 02:45:22,513 INFO L226 Difference]: Without dead ends: 192 [2022-02-24 02:45:22,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 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 02:45:22,514 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 154 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:22,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 60 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:22,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-24 02:45:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2022-02-24 02:45:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.3089887640449438) internal successors, (233), 178 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2022-02-24 02:45:22,540 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 238 transitions. Word has length 167 [2022-02-24 02:45:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:22,541 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 238 transitions. [2022-02-24 02:45:22,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 238 transitions. [2022-02-24 02:45:22,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-02-24 02:45:22,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:22,542 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:22,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 02:45:22,542 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:22,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1955934140, now seen corresponding path program 17 times [2022-02-24 02:45:22,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:22,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934032418] [2022-02-24 02:45:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:22,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:22,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:22,546 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:22,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:22,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:22,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934032418] [2022-02-24 02:45:22,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1934032418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:22,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:22,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:45:22,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095974086] [2022-02-24 02:45:22,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:22,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:45:22,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:22,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:45:22,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:45:22,769 INFO L87 Difference]: Start difference. First operand 184 states and 238 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:23,068 INFO L93 Difference]: Finished difference Result 330 states and 434 transitions. [2022-02-24 02:45:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:45:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-02-24 02:45:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:23,069 INFO L225 Difference]: With dead ends: 330 [2022-02-24 02:45:23,069 INFO L226 Difference]: Without dead ends: 204 [2022-02-24 02:45:23,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:45:23,070 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:23,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 50 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-24 02:45:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 196. [2022-02-24 02:45:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.3105263157894738) internal successors, (249), 190 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 254 transitions. [2022-02-24 02:45:23,102 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 254 transitions. Word has length 179 [2022-02-24 02:45:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:23,102 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 254 transitions. [2022-02-24 02:45:23,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 254 transitions. [2022-02-24 02:45:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-02-24 02:45:23,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:23,103 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:23,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 02:45:23,103 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1399647144, now seen corresponding path program 18 times [2022-02-24 02:45:23,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:23,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907127663] [2022-02-24 02:45:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:23,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:23,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:23,107 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:23,290 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:23,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907127663] [2022-02-24 02:45:23,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [907127663] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:23,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:23,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:45:23,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017448924] [2022-02-24 02:45:23,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:23,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:45:23,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:23,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:45:23,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:45:23,293 INFO L87 Difference]: Start difference. First operand 196 states and 254 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:23,631 INFO L93 Difference]: Finished difference Result 351 states and 462 transitions. [2022-02-24 02:45:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:45:23,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-02-24 02:45:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:23,632 INFO L225 Difference]: With dead ends: 351 [2022-02-24 02:45:23,632 INFO L226 Difference]: Without dead ends: 216 [2022-02-24 02:45:23,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:45:23,634 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 170 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:23,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 65 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-24 02:45:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2022-02-24 02:45:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.311881188118812) internal successors, (265), 202 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 270 transitions. [2022-02-24 02:45:23,676 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 270 transitions. Word has length 191 [2022-02-24 02:45:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:23,676 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 270 transitions. [2022-02-24 02:45:23,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 270 transitions. [2022-02-24 02:45:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-02-24 02:45:23,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:23,678 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:23,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 02:45:23,678 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1392433988, now seen corresponding path program 19 times [2022-02-24 02:45:23,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:23,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088580284] [2022-02-24 02:45:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:23,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:23,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:23,681 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:23,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:23,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088580284] [2022-02-24 02:45:23,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2088580284] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:23,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:23,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:45:23,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583827847] [2022-02-24 02:45:23,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:23,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:45:23,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:45:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:45:23,965 INFO L87 Difference]: Start difference. First operand 208 states and 270 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:24,284 INFO L93 Difference]: Finished difference Result 372 states and 490 transitions. [2022-02-24 02:45:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:45:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-02-24 02:45:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:24,286 INFO L225 Difference]: With dead ends: 372 [2022-02-24 02:45:24,286 INFO L226 Difference]: Without dead ends: 228 [2022-02-24 02:45:24,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:45:24,287 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 190 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:24,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 40 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:24,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-24 02:45:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 220. [2022-02-24 02:45:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.3130841121495327) internal successors, (281), 214 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 286 transitions. [2022-02-24 02:45:24,334 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 286 transitions. Word has length 203 [2022-02-24 02:45:24,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:24,335 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 286 transitions. [2022-02-24 02:45:24,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,335 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 286 transitions. [2022-02-24 02:45:24,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-02-24 02:45:24,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:24,336 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:24,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 02:45:24,336 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:24,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1722994856, now seen corresponding path program 20 times [2022-02-24 02:45:24,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:24,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881268823] [2022-02-24 02:45:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:24,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:24,339 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:24,340 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:24,571 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:24,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881268823] [2022-02-24 02:45:24,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881268823] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:24,572 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:24,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:45:24,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982923528] [2022-02-24 02:45:24,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:24,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:45:24,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:24,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:45:24,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:24,574 INFO L87 Difference]: Start difference. First operand 220 states and 286 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:24,903 INFO L93 Difference]: Finished difference Result 393 states and 518 transitions. [2022-02-24 02:45:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:45:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-02-24 02:45:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:24,905 INFO L225 Difference]: With dead ends: 393 [2022-02-24 02:45:24,905 INFO L226 Difference]: Without dead ends: 240 [2022-02-24 02:45:24,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:45:24,906 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 204 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:24,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 50 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-24 02:45:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 232. [2022-02-24 02:45:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.3141592920353982) internal successors, (297), 226 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 302 transitions. [2022-02-24 02:45:24,945 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 302 transitions. Word has length 215 [2022-02-24 02:45:24,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:24,945 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 302 transitions. [2022-02-24 02:45:24,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,945 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 302 transitions. [2022-02-24 02:45:24,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-02-24 02:45:24,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:24,946 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:24,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 02:45:24,946 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash -785811012, now seen corresponding path program 21 times [2022-02-24 02:45:24,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:24,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728873884] [2022-02-24 02:45:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:24,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:24,949 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:24,950 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:25,255 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:25,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728873884] [2022-02-24 02:45:25,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1728873884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:25,255 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:25,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:45:25,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749657231] [2022-02-24 02:45:25,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:25,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:45:25,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:45:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:45:25,256 INFO L87 Difference]: Start difference. First operand 232 states and 302 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:25,599 INFO L93 Difference]: Finished difference Result 414 states and 546 transitions. [2022-02-24 02:45:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:45:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-02-24 02:45:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:25,601 INFO L225 Difference]: With dead ends: 414 [2022-02-24 02:45:25,601 INFO L226 Difference]: Without dead ends: 252 [2022-02-24 02:45:25,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 02:45:25,602 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 194 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:25,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 45 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-24 02:45:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 244. [2022-02-24 02:45:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.315126050420168) internal successors, (313), 238 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 318 transitions. [2022-02-24 02:45:25,646 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 318 transitions. Word has length 227 [2022-02-24 02:45:25,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:25,646 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 318 transitions. [2022-02-24 02:45:25,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 318 transitions. [2022-02-24 02:45:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-24 02:45:25,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:25,648 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:25,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 02:45:25,648 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash 95578712, now seen corresponding path program 22 times [2022-02-24 02:45:25,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:25,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000351984] [2022-02-24 02:45:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:25,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:25,652 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:25,652 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:25,931 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:25,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000351984] [2022-02-24 02:45:25,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000351984] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:25,931 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:25,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:45:25,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950976908] [2022-02-24 02:45:25,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:25,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:45:25,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:25,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:45:25,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:45:25,932 INFO L87 Difference]: Start difference. First operand 244 states and 318 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:26,360 INFO L93 Difference]: Finished difference Result 435 states and 574 transitions. [2022-02-24 02:45:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:45:26,361 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-02-24 02:45:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:26,362 INFO L225 Difference]: With dead ends: 435 [2022-02-24 02:45:26,362 INFO L226 Difference]: Without dead ends: 264 [2022-02-24 02:45:26,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 02:45:26,363 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 214 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:26,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 65 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-24 02:45:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 256. [2022-02-24 02:45:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.316) internal successors, (329), 250 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 334 transitions. [2022-02-24 02:45:26,407 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 334 transitions. Word has length 239 [2022-02-24 02:45:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:26,408 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 334 transitions. [2022-02-24 02:45:26,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 334 transitions. [2022-02-24 02:45:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-02-24 02:45:26,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:26,409 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:26,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 02:45:26,409 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:26,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:26,409 INFO L85 PathProgramCache]: Analyzing trace with hash 517877436, now seen corresponding path program 23 times [2022-02-24 02:45:26,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:26,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166229946] [2022-02-24 02:45:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:26,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:26,412 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:26,412 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:26,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:26,708 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:26,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166229946] [2022-02-24 02:45:26,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1166229946] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:26,708 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:26,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:45:26,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300407466] [2022-02-24 02:45:26,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:26,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:45:26,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:45:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:45:26,709 INFO L87 Difference]: Start difference. First operand 256 states and 334 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:27,121 INFO L93 Difference]: Finished difference Result 456 states and 602 transitions. [2022-02-24 02:45:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 02:45:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-02-24 02:45:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:27,123 INFO L225 Difference]: With dead ends: 456 [2022-02-24 02:45:27,123 INFO L226 Difference]: Without dead ends: 276 [2022-02-24 02:45:27,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 02:45:27,124 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 244 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:27,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 45 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-24 02:45:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 268. [2022-02-24 02:45:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.316793893129771) internal successors, (345), 262 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 350 transitions. [2022-02-24 02:45:27,172 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 350 transitions. Word has length 251 [2022-02-24 02:45:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:27,172 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 350 transitions. [2022-02-24 02:45:27,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 350 transitions. [2022-02-24 02:45:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-02-24 02:45:27,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:27,173 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:27,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 02:45:27,173 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:27,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1993161384, now seen corresponding path program 24 times [2022-02-24 02:45:27,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:27,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457737622] [2022-02-24 02:45:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:27,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:27,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:27,177 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:27,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:27,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:27,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457737622] [2022-02-24 02:45:27,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [457737622] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:27,466 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:27,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:45:27,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190162101] [2022-02-24 02:45:27,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:27,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:45:27,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:27,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:45:27,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:45:27,467 INFO L87 Difference]: Start difference. First operand 268 states and 350 transitions. Second operand has 23 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 22 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:27,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:27,884 INFO L93 Difference]: Finished difference Result 477 states and 630 transitions. [2022-02-24 02:45:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:45:27,884 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 22 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-02-24 02:45:27,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:27,885 INFO L225 Difference]: With dead ends: 477 [2022-02-24 02:45:27,885 INFO L226 Difference]: Without dead ends: 288 [2022-02-24 02:45:27,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:45:27,887 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 244 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:27,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 50 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-24 02:45:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 280. [2022-02-24 02:45:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.3175182481751824) internal successors, (361), 274 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 366 transitions. [2022-02-24 02:45:27,938 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 366 transitions. Word has length 263 [2022-02-24 02:45:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:27,938 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 366 transitions. [2022-02-24 02:45:27,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 22 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 366 transitions. [2022-02-24 02:45:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-02-24 02:45:27,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:27,939 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:27,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 02:45:27,940 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1173308348, now seen corresponding path program 25 times [2022-02-24 02:45:27,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:27,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901074368] [2022-02-24 02:45:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:27,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:27,943 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:27,943 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:28,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:28,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:28,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901074368] [2022-02-24 02:45:28,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901074368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:28,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:28,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:45:28,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630850884] [2022-02-24 02:45:28,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:28,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:45:28,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:28,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:45:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:45:28,248 INFO L87 Difference]: Start difference. First operand 280 states and 366 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:28,716 INFO L93 Difference]: Finished difference Result 490 states and 646 transitions. [2022-02-24 02:45:28,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:45:28,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-02-24 02:45:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:28,718 INFO L225 Difference]: With dead ends: 490 [2022-02-24 02:45:28,718 INFO L226 Difference]: Without dead ends: 292 [2022-02-24 02:45:28,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 02:45:28,719 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 244 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:28,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 60 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:28,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-24 02:45:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-02-24 02:45:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.3181818181818181) internal successors, (377), 286 states have internal predecessors, (377), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 382 transitions. [2022-02-24 02:45:28,776 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 382 transitions. Word has length 275 [2022-02-24 02:45:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:28,776 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 382 transitions. [2022-02-24 02:45:28,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 382 transitions. [2022-02-24 02:45:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-02-24 02:45:28,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:28,777 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:28,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 02:45:28,777 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash -381796264, now seen corresponding path program 26 times [2022-02-24 02:45:28,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:28,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013596589] [2022-02-24 02:45:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:28,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:28,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:28,781 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:28,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:28,983 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:28,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013596589] [2022-02-24 02:45:28,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013596589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:28,984 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:28,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:28,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99292140] [2022-02-24 02:45:28,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:28,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:28,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:28,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:28,985 INFO L87 Difference]: Start difference. First operand 292 states and 382 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:29,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:29,284 INFO L93 Difference]: Finished difference Result 421 states and 545 transitions. [2022-02-24 02:45:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:45:29,284 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-02-24 02:45:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:29,285 INFO L225 Difference]: With dead ends: 421 [2022-02-24 02:45:29,285 INFO L226 Difference]: Without dead ends: 405 [2022-02-24 02:45:29,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:45:29,286 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 200 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:29,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 39 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:29,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-02-24 02:45:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 355. [2022-02-24 02:45:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.320916905444126) internal successors, (461), 349 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 466 transitions. [2022-02-24 02:45:29,362 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 466 transitions. Word has length 287 [2022-02-24 02:45:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:29,362 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 466 transitions. [2022-02-24 02:45:29,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 466 transitions. [2022-02-24 02:45:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-02-24 02:45:29,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:29,363 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:29,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 02:45:29,364 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:29,364 INFO L85 PathProgramCache]: Analyzing trace with hash 587258522, now seen corresponding path program 27 times [2022-02-24 02:45:29,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:29,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075993086] [2022-02-24 02:45:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:29,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:29,368 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:29,368 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:29,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:29,633 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:29,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075993086] [2022-02-24 02:45:29,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075993086] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:29,633 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:29,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:45:29,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043173806] [2022-02-24 02:45:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:29,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:45:29,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:45:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:45:29,634 INFO L87 Difference]: Start difference. First operand 355 states and 466 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:29,815 INFO L93 Difference]: Finished difference Result 380 states and 494 transitions. [2022-02-24 02:45:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 02:45:29,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-02-24 02:45:29,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:29,817 INFO L225 Difference]: With dead ends: 380 [2022-02-24 02:45:29,817 INFO L226 Difference]: Without dead ends: 369 [2022-02-24 02:45:29,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:29,818 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:29,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 34 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-02-24 02:45:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 358. [2022-02-24 02:45:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 352 states have (on average 1.3181818181818181) internal successors, (464), 352 states have internal predecessors, (464), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 469 transitions. [2022-02-24 02:45:29,891 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 469 transitions. Word has length 350 [2022-02-24 02:45:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:29,891 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 469 transitions. [2022-02-24 02:45:29,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 469 transitions. [2022-02-24 02:45:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-02-24 02:45:29,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:29,893 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:29,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 02:45:29,893 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:29,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:29,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1194423610, now seen corresponding path program 28 times [2022-02-24 02:45:29,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:29,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767564402] [2022-02-24 02:45:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:29,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:29,897 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:29,897 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:30,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:30,133 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:30,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767564402] [2022-02-24 02:45:30,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767564402] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:30,133 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:30,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:45:30,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324717976] [2022-02-24 02:45:30,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:30,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:45:30,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:45:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:30,135 INFO L87 Difference]: Start difference. First operand 358 states and 469 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:30,323 INFO L93 Difference]: Finished difference Result 391 states and 507 transitions. [2022-02-24 02:45:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:30,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 353 [2022-02-24 02:45:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:30,325 INFO L225 Difference]: With dead ends: 391 [2022-02-24 02:45:30,325 INFO L226 Difference]: Without dead ends: 380 [2022-02-24 02:45:30,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:30,326 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 128 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:30,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 39 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-24 02:45:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 361. [2022-02-24 02:45:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 355 states have (on average 1.315492957746479) internal successors, (467), 355 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 472 transitions. [2022-02-24 02:45:30,402 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 472 transitions. Word has length 353 [2022-02-24 02:45:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:30,403 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 472 transitions. [2022-02-24 02:45:30,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 472 transitions. [2022-02-24 02:45:30,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-02-24 02:45:30,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:30,404 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:30,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 02:45:30,404 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:30,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1152690534, now seen corresponding path program 29 times [2022-02-24 02:45:30,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:30,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212794162] [2022-02-24 02:45:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:30,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:30,408 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:30,409 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:30,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:30,647 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:30,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212794162] [2022-02-24 02:45:30,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [212794162] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:30,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:30,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:45:30,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206555351] [2022-02-24 02:45:30,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:30,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:45:30,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:45:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:45:30,648 INFO L87 Difference]: Start difference. First operand 361 states and 472 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:30,892 INFO L93 Difference]: Finished difference Result 405 states and 524 transitions. [2022-02-24 02:45:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:45:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 356 [2022-02-24 02:45:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:30,894 INFO L225 Difference]: With dead ends: 405 [2022-02-24 02:45:30,894 INFO L226 Difference]: Without dead ends: 394 [2022-02-24 02:45:30,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:45:30,894 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 151 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:30,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 39 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-02-24 02:45:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 364. [2022-02-24 02:45:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.312849162011173) internal successors, (470), 358 states have internal predecessors, (470), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 475 transitions. [2022-02-24 02:45:30,973 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 475 transitions. Word has length 356 [2022-02-24 02:45:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:30,974 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 475 transitions. [2022-02-24 02:45:30,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 475 transitions. [2022-02-24 02:45:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-02-24 02:45:30,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:30,975 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:30,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 02:45:30,975 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:30,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:30,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1962575558, now seen corresponding path program 30 times [2022-02-24 02:45:30,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:30,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669673796] [2022-02-24 02:45:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:30,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:30,979 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:30,980 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:31,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:31,202 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:31,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669673796] [2022-02-24 02:45:31,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [669673796] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:31,202 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:31,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:31,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241637333] [2022-02-24 02:45:31,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:31,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:31,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:31,204 INFO L87 Difference]: Start difference. First operand 364 states and 475 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:31,518 INFO L93 Difference]: Finished difference Result 484 states and 628 transitions. [2022-02-24 02:45:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:45:31,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-02-24 02:45:31,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:31,520 INFO L225 Difference]: With dead ends: 484 [2022-02-24 02:45:31,521 INFO L226 Difference]: Without dead ends: 473 [2022-02-24 02:45:31,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:45:31,521 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 197 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:31,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 49 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-02-24 02:45:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 367. [2022-02-24 02:45:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.3102493074792243) internal successors, (473), 361 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 478 transitions. [2022-02-24 02:45:31,601 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 478 transitions. Word has length 359 [2022-02-24 02:45:31,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:31,601 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 478 transitions. [2022-02-24 02:45:31,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 478 transitions. [2022-02-24 02:45:31,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-02-24 02:45:31,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:31,603 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:31,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 02:45:31,603 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash -121056614, now seen corresponding path program 31 times [2022-02-24 02:45:31,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:31,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819451781] [2022-02-24 02:45:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:31,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:31,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:31,617 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:31,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:31,877 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:31,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819451781] [2022-02-24 02:45:31,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819451781] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:31,877 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:31,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:45:31,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645431091] [2022-02-24 02:45:31,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:31,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:45:31,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:31,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:45:31,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:45:31,879 INFO L87 Difference]: Start difference. First operand 367 states and 478 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:32,237 INFO L93 Difference]: Finished difference Result 567 states and 738 transitions. [2022-02-24 02:45:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:45:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 362 [2022-02-24 02:45:32,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:32,239 INFO L225 Difference]: With dead ends: 567 [2022-02-24 02:45:32,239 INFO L226 Difference]: Without dead ends: 556 [2022-02-24 02:45:32,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:45:32,240 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 287 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:32,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 32 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-02-24 02:45:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 370. [2022-02-24 02:45:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 364 states have (on average 1.3076923076923077) internal successors, (476), 364 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 481 transitions. [2022-02-24 02:45:32,322 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 481 transitions. Word has length 362 [2022-02-24 02:45:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:32,323 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 481 transitions. [2022-02-24 02:45:32,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 481 transitions. [2022-02-24 02:45:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-02-24 02:45:32,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:32,324 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:32,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 02:45:32,324 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash 952532282, now seen corresponding path program 32 times [2022-02-24 02:45:32,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:32,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797075960] [2022-02-24 02:45:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:32,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:32,328 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:32,329 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:32,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:32,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:32,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797075960] [2022-02-24 02:45:32,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1797075960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:32,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:32,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:45:32,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981613005] [2022-02-24 02:45:32,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:32,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:45:32,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:45:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:32,577 INFO L87 Difference]: Start difference. First operand 370 states and 481 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:32,993 INFO L93 Difference]: Finished difference Result 650 states and 848 transitions. [2022-02-24 02:45:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:45:32,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 365 [2022-02-24 02:45:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:32,996 INFO L225 Difference]: With dead ends: 650 [2022-02-24 02:45:32,996 INFO L226 Difference]: Without dead ends: 639 [2022-02-24 02:45:32,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:32,996 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 324 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:32,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 42 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-24 02:45:33,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 373. [2022-02-24 02:45:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 367 states have (on average 1.3051771117166213) internal successors, (479), 367 states have internal predecessors, (479), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 484 transitions. [2022-02-24 02:45:33,084 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 484 transitions. Word has length 365 [2022-02-24 02:45:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:33,085 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 484 transitions. [2022-02-24 02:45:33,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:33,085 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 484 transitions. [2022-02-24 02:45:33,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-02-24 02:45:33,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:33,086 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 7, 7, 7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:33,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 02:45:33,086 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:33,087 INFO L85 PathProgramCache]: Analyzing trace with hash -382120294, now seen corresponding path program 33 times [2022-02-24 02:45:33,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:33,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813001106] [2022-02-24 02:45:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:33,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:33,091 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:33,091 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:33,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:33,368 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:33,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813001106] [2022-02-24 02:45:33,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1813001106] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:33,368 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:33,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:45:33,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695902602] [2022-02-24 02:45:33,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:33,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:45:33,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:33,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:45:33,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:45:33,369 INFO L87 Difference]: Start difference. First operand 373 states and 484 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:33,852 INFO L93 Difference]: Finished difference Result 733 states and 958 transitions. [2022-02-24 02:45:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:45:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 368 [2022-02-24 02:45:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:33,855 INFO L225 Difference]: With dead ends: 733 [2022-02-24 02:45:33,855 INFO L226 Difference]: Without dead ends: 722 [2022-02-24 02:45:33,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:45:33,856 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 366 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:33,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 47 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-02-24 02:45:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 376. [2022-02-24 02:45:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.3027027027027027) internal successors, (482), 370 states have internal predecessors, (482), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 487 transitions. [2022-02-24 02:45:33,957 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 487 transitions. Word has length 368 [2022-02-24 02:45:33,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:33,957 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 487 transitions. [2022-02-24 02:45:33,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:33,957 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 487 transitions. [2022-02-24 02:45:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-02-24 02:45:33,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:33,959 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 8, 8, 8, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:33,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 02:45:33,959 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:33,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1790214458, now seen corresponding path program 34 times [2022-02-24 02:45:33,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:33,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132920545] [2022-02-24 02:45:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:33,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:33,964 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:33,964 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:34,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:34,249 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:34,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132920545] [2022-02-24 02:45:34,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132920545] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:34,250 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:34,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:45:34,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126107037] [2022-02-24 02:45:34,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:34,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:45:34,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:34,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:45:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:45:34,252 INFO L87 Difference]: Start difference. First operand 376 states and 487 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:34,892 INFO L93 Difference]: Finished difference Result 816 states and 1068 transitions. [2022-02-24 02:45:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:45:34,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 371 [2022-02-24 02:45:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:34,898 INFO L225 Difference]: With dead ends: 816 [2022-02-24 02:45:34,898 INFO L226 Difference]: Without dead ends: 805 [2022-02-24 02:45:34,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:45:34,899 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 425 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:34,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 32 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:34,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-02-24 02:45:35,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 379. [2022-02-24 02:45:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 373 states have (on average 1.3002680965147453) internal successors, (485), 373 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 490 transitions. [2022-02-24 02:45:35,026 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 490 transitions. Word has length 371 [2022-02-24 02:45:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:35,027 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 490 transitions. [2022-02-24 02:45:35,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 490 transitions. [2022-02-24 02:45:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-02-24 02:45:35,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:35,028 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 9, 9, 9, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:35,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 02:45:35,028 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:35,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1247595162, now seen corresponding path program 35 times [2022-02-24 02:45:35,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:35,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793085422] [2022-02-24 02:45:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:35,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:35,036 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:35,036 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:35,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:35,287 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:35,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793085422] [2022-02-24 02:45:35,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793085422] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:35,287 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:35,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:45:35,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879351179] [2022-02-24 02:45:35,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:35,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:45:35,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:35,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:45:35,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:45:35,288 INFO L87 Difference]: Start difference. First operand 379 states and 490 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:35,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:35,947 INFO L93 Difference]: Finished difference Result 899 states and 1178 transitions. [2022-02-24 02:45:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:45:35,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 374 [2022-02-24 02:45:35,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:35,951 INFO L225 Difference]: With dead ends: 899 [2022-02-24 02:45:35,951 INFO L226 Difference]: Without dead ends: 888 [2022-02-24 02:45:35,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:45:35,952 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 425 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:35,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 57 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-02-24 02:45:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 382. [2022-02-24 02:45:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 376 states have (on average 1.297872340425532) internal successors, (488), 376 states have internal predecessors, (488), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 493 transitions. [2022-02-24 02:45:36,053 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 493 transitions. Word has length 374 [2022-02-24 02:45:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:36,053 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 493 transitions. [2022-02-24 02:45:36,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 493 transitions. [2022-02-24 02:45:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-02-24 02:45:36,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:36,054 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 10, 10, 10, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:36,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 02:45:36,055 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1961917126, now seen corresponding path program 36 times [2022-02-24 02:45:36,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:36,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356167619] [2022-02-24 02:45:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:36,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:36,059 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:36,059 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:36,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:36,356 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:36,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356167619] [2022-02-24 02:45:36,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [356167619] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:36,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:36,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:45:36,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016927844] [2022-02-24 02:45:36,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:36,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:45:36,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:45:36,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:45:36,358 INFO L87 Difference]: Start difference. First operand 382 states and 493 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:37,136 INFO L93 Difference]: Finished difference Result 982 states and 1288 transitions. [2022-02-24 02:45:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:45:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 377 [2022-02-24 02:45:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:37,139 INFO L225 Difference]: With dead ends: 982 [2022-02-24 02:45:37,139 INFO L226 Difference]: Without dead ends: 971 [2022-02-24 02:45:37,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:45:37,140 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 570 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:37,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 27 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:37,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-02-24 02:45:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 385. [2022-02-24 02:45:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 379 states have (on average 1.2955145118733509) internal successors, (491), 379 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 496 transitions. [2022-02-24 02:45:37,252 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 496 transitions. Word has length 377 [2022-02-24 02:45:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:37,252 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 496 transitions. [2022-02-24 02:45:37,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 496 transitions. [2022-02-24 02:45:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-02-24 02:45:37,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:37,254 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 11, 11, 11, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:37,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 02:45:37,254 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:37,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1980545382, now seen corresponding path program 37 times [2022-02-24 02:45:37,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:37,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93329654] [2022-02-24 02:45:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:37,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:37,258 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:37,259 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:37,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:37,543 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:37,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93329654] [2022-02-24 02:45:37,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [93329654] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:37,543 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:37,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:45:37,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812226020] [2022-02-24 02:45:37,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:37,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:45:37,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:45:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:45:37,544 INFO L87 Difference]: Start difference. First operand 385 states and 496 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:38,454 INFO L93 Difference]: Finished difference Result 1065 states and 1398 transitions. [2022-02-24 02:45:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:45:38,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 380 [2022-02-24 02:45:38,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:38,458 INFO L225 Difference]: With dead ends: 1065 [2022-02-24 02:45:38,458 INFO L226 Difference]: Without dead ends: 1054 [2022-02-24 02:45:38,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:45:38,458 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 654 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:38,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 42 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-02-24 02:45:38,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 388. [2022-02-24 02:45:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.293193717277487) internal successors, (494), 382 states have internal predecessors, (494), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 499 transitions. [2022-02-24 02:45:38,570 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 499 transitions. Word has length 380 [2022-02-24 02:45:38,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:38,570 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 499 transitions. [2022-02-24 02:45:38,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 499 transitions. [2022-02-24 02:45:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-02-24 02:45:38,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:38,571 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 12, 12, 12, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:38,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 02:45:38,572 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1410828602, now seen corresponding path program 38 times [2022-02-24 02:45:38,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:38,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155847579] [2022-02-24 02:45:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:38,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:38,576 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:38,577 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:38,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:38,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:38,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155847579] [2022-02-24 02:45:38,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [155847579] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:38,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:38,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:45:38,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76107076] [2022-02-24 02:45:38,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:38,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:45:38,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:45:38,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:45:38,866 INFO L87 Difference]: Start difference. First operand 388 states and 499 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:39,935 INFO L93 Difference]: Finished difference Result 1148 states and 1508 transitions. [2022-02-24 02:45:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:45:39,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 383 [2022-02-24 02:45:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:39,939 INFO L225 Difference]: With dead ends: 1148 [2022-02-24 02:45:39,939 INFO L226 Difference]: Without dead ends: 1137 [2022-02-24 02:45:39,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:45:39,939 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 750 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:39,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 42 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-02-24 02:45:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 391. [2022-02-24 02:45:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 385 states have (on average 1.290909090909091) internal successors, (497), 385 states have internal predecessors, (497), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 502 transitions. [2022-02-24 02:45:40,064 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 502 transitions. Word has length 383 [2022-02-24 02:45:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:40,064 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 502 transitions. [2022-02-24 02:45:40,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 502 transitions. [2022-02-24 02:45:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-02-24 02:45:40,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:40,066 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 13, 13, 13, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:40,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 02:45:40,066 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:40,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:40,066 INFO L85 PathProgramCache]: Analyzing trace with hash -977485158, now seen corresponding path program 39 times [2022-02-24 02:45:40,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:40,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423622882] [2022-02-24 02:45:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:40,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:40,075 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:40,075 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:40,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:40,376 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:40,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423622882] [2022-02-24 02:45:40,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [423622882] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:40,376 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:40,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:45:40,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644626082] [2022-02-24 02:45:40,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:40,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:45:40,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:45:40,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:45:40,377 INFO L87 Difference]: Start difference. First operand 391 states and 502 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:41,575 INFO L93 Difference]: Finished difference Result 1231 states and 1618 transitions. [2022-02-24 02:45:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:45:41,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 386 [2022-02-24 02:45:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:41,579 INFO L225 Difference]: With dead ends: 1231 [2022-02-24 02:45:41,579 INFO L226 Difference]: Without dead ends: 1220 [2022-02-24 02:45:41,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:45:41,579 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 652 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:41,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 52 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-02-24 02:45:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 394. [2022-02-24 02:45:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 388 states have (on average 1.288659793814433) internal successors, (500), 388 states have internal predecessors, (500), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 505 transitions. [2022-02-24 02:45:41,705 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 505 transitions. Word has length 386 [2022-02-24 02:45:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:41,705 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 505 transitions. [2022-02-24 02:45:41,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 505 transitions. [2022-02-24 02:45:41,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-02-24 02:45:41,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:41,706 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 14, 14, 14, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:41,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 02:45:41,706 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:41,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:41,707 INFO L85 PathProgramCache]: Analyzing trace with hash -804483782, now seen corresponding path program 40 times [2022-02-24 02:45:41,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:41,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806096179] [2022-02-24 02:45:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:41,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:41,711 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:41,711 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:42,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:42,028 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:42,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806096179] [2022-02-24 02:45:42,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806096179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:42,029 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:42,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:45:42,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041162415] [2022-02-24 02:45:42,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:42,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:45:42,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:42,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:45:42,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:42,030 INFO L87 Difference]: Start difference. First operand 394 states and 505 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:43,364 INFO L93 Difference]: Finished difference Result 1314 states and 1728 transitions. [2022-02-24 02:45:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:45:43,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 389 [2022-02-24 02:45:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:43,368 INFO L225 Difference]: With dead ends: 1314 [2022-02-24 02:45:43,368 INFO L226 Difference]: Without dead ends: 1303 [2022-02-24 02:45:43,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:45:43,369 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 805 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:43,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 42 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-02-24 02:45:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 397. [2022-02-24 02:45:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 391 states have (on average 1.2864450127877238) internal successors, (503), 391 states have internal predecessors, (503), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 508 transitions. [2022-02-24 02:45:43,499 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 508 transitions. Word has length 389 [2022-02-24 02:45:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:43,500 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 508 transitions. [2022-02-24 02:45:43,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 508 transitions. [2022-02-24 02:45:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-02-24 02:45:43,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:43,501 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 15, 15, 15, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:43,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 02:45:43,501 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash -881246566, now seen corresponding path program 41 times [2022-02-24 02:45:43,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:43,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561910058] [2022-02-24 02:45:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:43,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:43,506 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:43,506 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:43,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:43,850 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:43,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561910058] [2022-02-24 02:45:43,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561910058] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:43,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:43,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:45:43,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279449666] [2022-02-24 02:45:43,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:43,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:45:43,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:43,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:45:43,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:45:43,851 INFO L87 Difference]: Start difference. First operand 397 states and 508 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:45,382 INFO L93 Difference]: Finished difference Result 1397 states and 1838 transitions. [2022-02-24 02:45:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:45:45,382 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 392 [2022-02-24 02:45:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:45,386 INFO L225 Difference]: With dead ends: 1397 [2022-02-24 02:45:45,386 INFO L226 Difference]: Without dead ends: 1386 [2022-02-24 02:45:45,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 02:45:45,386 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 870 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:45,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 42 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2022-02-24 02:45:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 400. [2022-02-24 02:45:45,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 394 states have (on average 1.284263959390863) internal successors, (506), 394 states have internal predecessors, (506), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 511 transitions. [2022-02-24 02:45:45,524 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 511 transitions. Word has length 392 [2022-02-24 02:45:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:45,524 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 511 transitions. [2022-02-24 02:45:45,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 511 transitions. [2022-02-24 02:45:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-02-24 02:45:45,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:45,526 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 16, 16, 16, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:45,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 02:45:45,526 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:45,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1496224058, now seen corresponding path program 42 times [2022-02-24 02:45:45,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:45,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390740880] [2022-02-24 02:45:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:45,531 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:45,531 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:45,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:45,858 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:45,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390740880] [2022-02-24 02:45:45,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [390740880] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:45,858 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:45,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:45:45,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956764701] [2022-02-24 02:45:45,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:45,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:45:45,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:45,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:45:45,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:45:45,860 INFO L87 Difference]: Start difference. First operand 400 states and 511 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:47,626 INFO L93 Difference]: Finished difference Result 1480 states and 1948 transitions. [2022-02-24 02:45:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:45:47,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2022-02-24 02:45:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:47,630 INFO L225 Difference]: With dead ends: 1480 [2022-02-24 02:45:47,630 INFO L226 Difference]: Without dead ends: 1469 [2022-02-24 02:45:47,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 02:45:47,631 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1004 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:47,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 42 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2022-02-24 02:45:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 403. [2022-02-24 02:45:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 397 states have (on average 1.2821158690176322) internal successors, (509), 397 states have internal predecessors, (509), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 514 transitions. [2022-02-24 02:45:47,780 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 514 transitions. Word has length 395 [2022-02-24 02:45:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:47,780 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 514 transitions. [2022-02-24 02:45:47,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 514 transitions. [2022-02-24 02:45:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-02-24 02:45:47,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:47,782 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 17, 17, 17, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:47,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 02:45:47,782 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash 417905306, now seen corresponding path program 43 times [2022-02-24 02:45:47,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:47,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981793971] [2022-02-24 02:45:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:47,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:47,787 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:47,787 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:48,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:48,136 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:48,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981793971] [2022-02-24 02:45:48,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [981793971] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:48,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:48,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:45:48,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077078670] [2022-02-24 02:45:48,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:48,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:45:48,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:48,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:45:48,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:45:48,137 INFO L87 Difference]: Start difference. First operand 403 states and 514 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:50,077 INFO L93 Difference]: Finished difference Result 1563 states and 2058 transitions. [2022-02-24 02:45:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 02:45:50,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 398 [2022-02-24 02:45:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:50,081 INFO L225 Difference]: With dead ends: 1563 [2022-02-24 02:45:50,081 INFO L226 Difference]: Without dead ends: 1552 [2022-02-24 02:45:50,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 02:45:50,082 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 984 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:50,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 47 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2022-02-24 02:45:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 406. [2022-02-24 02:45:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 400 states have (on average 1.28) internal successors, (512), 400 states have internal predecessors, (512), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 517 transitions. [2022-02-24 02:45:50,254 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 517 transitions. Word has length 398 [2022-02-24 02:45:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:50,255 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 517 transitions. [2022-02-24 02:45:50,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 517 transitions. [2022-02-24 02:45:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-02-24 02:45:50,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:50,256 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 18, 18, 18, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:50,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 02:45:50,256 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:50,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1715628742, now seen corresponding path program 44 times [2022-02-24 02:45:50,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:50,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865089407] [2022-02-24 02:45:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:50,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:50,262 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:50,262 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:50,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:50,635 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:50,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865089407] [2022-02-24 02:45:50,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1865089407] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:50,636 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:50,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:45:50,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194724785] [2022-02-24 02:45:50,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:50,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:45:50,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:50,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:45:50,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:45:50,637 INFO L87 Difference]: Start difference. First operand 406 states and 517 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:52,899 INFO L93 Difference]: Finished difference Result 1646 states and 2168 transitions. [2022-02-24 02:45:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:45:52,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 401 [2022-02-24 02:45:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:52,904 INFO L225 Difference]: With dead ends: 1646 [2022-02-24 02:45:52,904 INFO L226 Difference]: Without dead ends: 1635 [2022-02-24 02:45:52,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:45:52,905 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1019 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:52,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 42 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:45:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-02-24 02:45:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 409. [2022-02-24 02:45:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 403 states have (on average 1.2779156327543424) internal successors, (515), 403 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 520 transitions. [2022-02-24 02:45:53,069 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 520 transitions. Word has length 401 [2022-02-24 02:45:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:53,070 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 520 transitions. [2022-02-24 02:45:53,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 520 transitions. [2022-02-24 02:45:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-02-24 02:45:53,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:53,071 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 19, 19, 19, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:53,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 02:45:53,071 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash -607439206, now seen corresponding path program 45 times [2022-02-24 02:45:53,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:53,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447613248] [2022-02-24 02:45:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:53,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:53,077 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:53,077 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:53,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:53,459 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:53,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447613248] [2022-02-24 02:45:53,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447613248] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:53,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:53,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:45:53,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083315042] [2022-02-24 02:45:53,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:53,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:45:53,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:45:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:45:53,460 INFO L87 Difference]: Start difference. First operand 409 states and 520 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:56,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:56,013 INFO L93 Difference]: Finished difference Result 1727 states and 2276 transitions. [2022-02-24 02:45:56,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:45:56,013 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 404 [2022-02-24 02:45:56,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:56,017 INFO L225 Difference]: With dead ends: 1727 [2022-02-24 02:45:56,018 INFO L226 Difference]: Without dead ends: 1716 [2022-02-24 02:45:56,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 02:45:56,018 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1538 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:56,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1538 Valid, 42 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:45:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-02-24 02:45:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 412. [2022-02-24 02:45:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 406 states have (on average 1.2758620689655173) internal successors, (518), 406 states have internal predecessors, (518), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 523 transitions. [2022-02-24 02:45:56,207 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 523 transitions. Word has length 404 [2022-02-24 02:45:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:56,208 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 523 transitions. [2022-02-24 02:45:56,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 523 transitions. [2022-02-24 02:45:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-02-24 02:45:56,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:56,212 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 20, 20, 20, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:56,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 02:45:56,212 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:56,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:56,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1946576582, now seen corresponding path program 46 times [2022-02-24 02:45:56,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:56,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148401846] [2022-02-24 02:45:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:56,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:56,220 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:56,220 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:36,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:36,857 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:36,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148401846] [2022-02-24 02:49:36,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1148401846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:36,857 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:36,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-24 02:49:36,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76788675] [2022-02-24 02:49:36,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:36,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-24 02:49:36,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-24 02:49:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=3506, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 02:49:36,859 INFO L87 Difference]: Start difference. First operand 412 states and 523 transitions. Second operand has 62 states, 62 states have (on average 2.532258064516129) internal successors, (157), 61 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:47,519 INFO L93 Difference]: Finished difference Result 777 states and 985 transitions. [2022-02-24 02:49:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 02:49:47,519 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.532258064516129) internal successors, (157), 61 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 407 [2022-02-24 02:49:47,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:47,521 INFO L225 Difference]: With dead ends: 777 [2022-02-24 02:49:47,521 INFO L226 Difference]: Without dead ends: 436 [2022-02-24 02:49:47,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 103 SyntacticMatches, 13 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4532 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1063, Invalid=14189, Unknown=0, NotChecked=0, Total=15252 [2022-02-24 02:49:47,523 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 306 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 3251 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 3251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:47,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 145 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 3251 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 02:49:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-02-24 02:49:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 427. [2022-02-24 02:49:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 421 states have (on average 1.2660332541567696) internal successors, (533), 421 states have internal predecessors, (533), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:49:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 538 transitions. [2022-02-24 02:49:47,774 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 538 transitions. Word has length 407 [2022-02-24 02:49:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:47,774 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 538 transitions. [2022-02-24 02:49:47,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.532258064516129) internal successors, (157), 61 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 538 transitions. [2022-02-24 02:49:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-02-24 02:49:47,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:47,775 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 95, 20, 20, 20, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:47,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 02:49:47,776 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:47,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1353169732, now seen corresponding path program 1 times [2022-02-24 02:49:47,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:47,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144059424] [2022-02-24 02:49:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:47,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:47,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:47,781 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:48,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:48,602 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:48,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144059424] [2022-02-24 02:52:48,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144059424] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:48,602 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:48,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-24 02:52:48,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297515567] [2022-02-24 02:52:48,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:48,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-24 02:52:48,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:48,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-24 02:52:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=5798, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 02:52:48,604 INFO L87 Difference]: Start difference. First operand 427 states and 538 transitions. Second operand has 78 states, 78 states have (on average 1.641025641025641) internal successors, (128), 77 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:42,156 INFO L93 Difference]: Finished difference Result 1269 states and 1606 transitions. [2022-02-24 02:53:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-02-24 02:53:42,156 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.641025641025641) internal successors, (128), 77 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 407 [2022-02-24 02:53:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:42,159 INFO L225 Difference]: With dead ends: 1269 [2022-02-24 02:53:42,159 INFO L226 Difference]: Without dead ends: 967 [2022-02-24 02:53:42,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10667 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=1532, Invalid=41524, Unknown=0, NotChecked=0, Total=43056 [2022-02-24 02:53:42,162 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 466 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 12436 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 12959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 12436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:42,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 263 Invalid, 12959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 12436 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2022-02-24 02:53:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-02-24 02:53:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 829. [2022-02-24 02:53:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 823 states have (on average 1.298906439854192) internal successors, (1069), 823 states have internal predecessors, (1069), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:53:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1074 transitions. [2022-02-24 02:53:42,874 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1074 transitions. Word has length 407 [2022-02-24 02:53:42,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:42,874 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1074 transitions. [2022-02-24 02:53:42,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.641025641025641) internal successors, (128), 77 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1074 transitions. [2022-02-24 02:53:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-02-24 02:53:42,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:42,876 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 91, 20, 20, 20, 9, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:42,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 02:53:42,876 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:42,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2040183748, now seen corresponding path program 2 times [2022-02-24 02:53:42,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:42,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334238686] [2022-02-24 02:53:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:42,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:42,882 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:42,882 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:57:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:09,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:57:09,614 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:09,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334238686] [2022-02-24 02:57:09,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [334238686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:09,615 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:09,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 02:57:09,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926090342] [2022-02-24 02:57:09,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:09,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 02:57:09,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 02:57:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 02:57:09,616 INFO L87 Difference]: Start difference. First operand 829 states and 1074 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:57:12,859 INFO L93 Difference]: Finished difference Result 1527 states and 1981 transitions. [2022-02-24 02:57:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 02:57:12,859 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 407 [2022-02-24 02:57:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:57:12,861 INFO L225 Difference]: With dead ends: 1527 [2022-02-24 02:57:12,861 INFO L226 Difference]: Without dead ends: 733 [2022-02-24 02:57:12,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=394, Invalid=3266, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 02:57:12,862 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 139 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2581 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:57:12,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 82 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2581 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 02:57:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-02-24 02:57:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 427. [2022-02-24 02:57:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 421 states have (on average 1.2541567695961995) internal successors, (528), 421 states have internal predecessors, (528), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:57:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 533 transitions. [2022-02-24 02:57:13,259 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 533 transitions. Word has length 407 [2022-02-24 02:57:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:13,259 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 533 transitions. [2022-02-24 02:57:13,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 533 transitions. [2022-02-24 02:57:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-02-24 02:57:13,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:13,260 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 90, 20, 20, 20, 10, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:57:13,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 02:57:13,261 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:13,261 INFO L85 PathProgramCache]: Analyzing trace with hash 288806718, now seen corresponding path program 3 times [2022-02-24 02:57:13,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:13,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114431071] [2022-02-24 02:57:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:13,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:13,266 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:57:13,266 INFO L281 tedInterpolationCore]: Could not accelerate.