/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 22:09:22,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 22:09:22,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 22:09:22,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 22:09:22,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 22:09:22,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 22:09:22,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 22:09:22,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 22:09:22,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 22:09:22,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 22:09:22,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 22:09:22,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 22:09:22,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 22:09:22,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 22:09:22,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 22:09:22,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 22:09:22,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 22:09:22,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 22:09:22,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 22:09:22,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 22:09:22,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 22:09:22,838 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 22:09:22,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 22:09:22,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 22:09:22,840 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 22:09:22,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 22:09:22,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 22:09:22,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 22:09:22,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 22:09:22,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 22:09:22,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 22:09:22,841 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 22:09:22,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 22:09:22,841 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 22:09:22,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 22:09:22,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 22:09:22,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 22:09:22,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 22:09:22,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 22:09:22,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:09:22,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 22:09:22,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 22:09:22,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 22:09:22,842 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 22:09:22,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 22:09:23,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 22:09:23,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 22:09:23,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 22:09:23,111 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 22:09:23,112 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 22:09:23,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c [2022-01-31 22:09:23,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16de1e351/fc223e3d64824d549dd952936db32c56/FLAG7eb482603 [2022-01-31 22:09:23,575 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 22:09:23,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c [2022-01-31 22:09:23,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16de1e351/fc223e3d64824d549dd952936db32c56/FLAG7eb482603 [2022-01-31 22:09:23,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16de1e351/fc223e3d64824d549dd952936db32c56 [2022-01-31 22:09:23,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 22:09:23,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 22:09:23,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 22:09:23,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 22:09:23,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 22:09:23,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:09:23" (1/1) ... [2022-01-31 22:09:23,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc42ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:23, skipping insertion in model container [2022-01-31 22:09:23,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:09:23" (1/1) ... [2022-01-31 22:09:23,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 22:09:24,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 22:09:24,220 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c[43387,43400] [2022-01-31 22:09:24,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:09:24,229 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 22:09:24,270 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c[43387,43400] [2022-01-31 22:09:24,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:09:24,282 INFO L208 MainTranslator]: Completed translation [2022-01-31 22:09:24,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:24 WrapperNode [2022-01-31 22:09:24,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 22:09:24,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 22:09:24,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 22:09:24,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 22:09:24,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:24" (1/1) ... [2022-01-31 22:09:24,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:24" (1/1) ... [2022-01-31 22:09:24,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:24" (1/1) ... [2022-01-31 22:09:24,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:24" (1/1) ... [2022-01-31 22:09:24,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:24" (1/1) ... [2022-01-31 22:09:24,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:24" (1/1) ... [2022-01-31 22:09:24,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:24" (1/1) ... [2022-01-31 22:09:24,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 22:09:24,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 22:09:24,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 22:09:24,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 22:09:24,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:24" (1/1) ... [2022-01-31 22:09:24,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:09:24,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 22:09:24,356 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) [2022-01-31 22:09:24,381 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 [2022-01-31 22:09:24,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 22:09:24,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 22:09:24,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 22:09:24,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2022-01-31 22:09:24,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR [2022-01-31 22:09:24,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 22:09:24,402 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 22:09:24,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 22:09:24,402 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 22:09:24,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 22:09:24,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-01-31 22:09:24,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 22:09:24,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 22:09:24,404 INFO L130 BoogieDeclarations]: Found specification of procedure ERR [2022-01-31 22:09:24,405 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2022-01-31 22:09:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 22:09:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 22:09:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 22:09:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 22:09:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 22:09:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 22:09:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 22:09:24,494 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 22:09:24,496 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 22:09:24,590 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-31 22:09:24,860 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-01-31 22:09:24,860 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-01-31 22:09:24,866 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 22:09:24,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 22:09:24,872 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 22:09:24,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:09:24 BoogieIcfgContainer [2022-01-31 22:09:24,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 22:09:24,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 22:09:24,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 22:09:24,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 22:09:24,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:09:23" (1/3) ... [2022-01-31 22:09:24,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42acde1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:09:24, skipping insertion in model container [2022-01-31 22:09:24,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:24" (2/3) ... [2022-01-31 22:09:24,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42acde1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:09:24, skipping insertion in model container [2022-01-31 22:09:24,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:09:24" (3/3) ... [2022-01-31 22:09:24,881 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_1.cil-2.c [2022-01-31 22:09:24,885 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 22:09:24,885 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 22:09:24,922 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 22:09:24,927 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=JORDAN [2022-01-31 22:09:24,927 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 22:09:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 145 states have (on average 1.696551724137931) internal successors, (246), 147 states have internal predecessors, (246), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 22:09:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 22:09:24,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:24,952 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:09:24,952 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash -360564499, now seen corresponding path program 1 times [2022-01-31 22:09:24,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:24,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641056580] [2022-01-31 22:09:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:24,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:25,022 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:09:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:25,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:25,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:25,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641056580] [2022-01-31 22:09:25,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [641056580] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:25,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:25,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:09:25,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68908328] [2022-01-31 22:09:25,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:25,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:09:25,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:09:25,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:09:25,315 INFO L87 Difference]: Start difference. First operand has 155 states, 145 states have (on average 1.696551724137931) internal successors, (246), 147 states have internal predecessors, (246), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:25,749 INFO L93 Difference]: Finished difference Result 424 states and 712 transitions. [2022-01-31 22:09:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:09:25,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 22:09:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:25,769 INFO L225 Difference]: With dead ends: 424 [2022-01-31 22:09:25,770 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 22:09:25,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:09:25,776 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 637 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:25,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 251 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 22:09:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 22:09:25,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-01-31 22:09:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.52) internal successors, (380), 250 states have internal predecessors, (380), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 385 transitions. [2022-01-31 22:09:25,850 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 385 transitions. Word has length 52 [2022-01-31 22:09:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:25,850 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 385 transitions. [2022-01-31 22:09:25,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 385 transitions. [2022-01-31 22:09:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 22:09:25,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:25,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2022-01-31 22:09:25,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 22:09:25,854 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:25,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1193418840, now seen corresponding path program 1 times [2022-01-31 22:09:25,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:25,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419967024] [2022-01-31 22:09:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:26,743 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:26,746 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 22:09:26,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:26,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:27,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:27,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419967024] [2022-01-31 22:09:27,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [419967024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:27,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:27,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 22:09:27,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935673919] [2022-01-31 22:09:27,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:27,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 22:09:27,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 22:09:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-31 22:09:27,709 INFO L87 Difference]: Start difference. First operand 256 states and 385 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:28,621 INFO L93 Difference]: Finished difference Result 709 states and 1101 transitions. [2022-01-31 22:09:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 22:09:28,622 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 22:09:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:28,625 INFO L225 Difference]: With dead ends: 709 [2022-01-31 22:09:28,625 INFO L226 Difference]: Without dead ends: 431 [2022-01-31 22:09:28,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-01-31 22:09:28,628 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 937 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 479 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:28,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 206 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 912 Invalid, 0 Unknown, 479 Unchecked, 0.6s Time] [2022-01-31 22:09:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-31 22:09:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 369. [2022-01-31 22:09:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 363 states have (on average 1.4517906336088153) internal successors, (527), 363 states have internal predecessors, (527), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 532 transitions. [2022-01-31 22:09:28,701 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 532 transitions. Word has length 68 [2022-01-31 22:09:28,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:28,703 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 532 transitions. [2022-01-31 22:09:28,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 532 transitions. [2022-01-31 22:09:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 22:09:28,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:28,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:09:28,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 22:09:28,713 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:28,714 INFO L85 PathProgramCache]: Analyzing trace with hash 436825771, now seen corresponding path program 1 times [2022-01-31 22:09:28,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:28,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127764691] [2022-01-31 22:09:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:28,848 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:29,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:29,276 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:29,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:29,353 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:29,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:29,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:29,831 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127764691] [2022-01-31 22:09:29,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [127764691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:29,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:29,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 22:09:29,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102195444] [2022-01-31 22:09:29,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:29,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 22:09:29,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:29,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 22:09:29,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-31 22:09:29,833 INFO L87 Difference]: Start difference. First operand 369 states and 532 transitions. Second operand has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:31,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:31,329 INFO L93 Difference]: Finished difference Result 668 states and 941 transitions. [2022-01-31 22:09:31,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 22:09:31,330 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 22:09:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:31,334 INFO L225 Difference]: With dead ends: 668 [2022-01-31 22:09:31,334 INFO L226 Difference]: Without dead ends: 471 [2022-01-31 22:09:31,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 22:09:31,341 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 873 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:31,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 245 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 22:09:31,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-31 22:09:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 388. [2022-01-31 22:09:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.4293193717277486) internal successors, (546), 382 states have internal predecessors, (546), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 551 transitions. [2022-01-31 22:09:31,384 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 551 transitions. Word has length 89 [2022-01-31 22:09:31,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:31,385 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 551 transitions. [2022-01-31 22:09:31,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 551 transitions. [2022-01-31 22:09:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 22:09:31,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:31,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:09:31,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 22:09:31,388 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1612562071, now seen corresponding path program 1 times [2022-01-31 22:09:31,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:31,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582100691] [2022-01-31 22:09:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:31,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:31,910 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:31,910 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:31,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:31,982 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:31,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:32,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:32,442 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:32,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582100691] [2022-01-31 22:09:32,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1582100691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:32,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:32,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 22:09:32,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28547368] [2022-01-31 22:09:32,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:32,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 22:09:32,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 22:09:32,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-31 22:09:32,445 INFO L87 Difference]: Start difference. First operand 388 states and 551 transitions. Second operand has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:33,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:33,587 INFO L93 Difference]: Finished difference Result 687 states and 954 transitions. [2022-01-31 22:09:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 22:09:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 22:09:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:33,589 INFO L225 Difference]: With dead ends: 687 [2022-01-31 22:09:33,589 INFO L226 Difference]: Without dead ends: 452 [2022-01-31 22:09:33,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 22:09:33,592 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 945 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:33,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 220 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 22:09:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-31 22:09:33,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 369. [2022-01-31 22:09:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 363 states have (on average 1.4490358126721763) internal successors, (526), 363 states have internal predecessors, (526), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 531 transitions. [2022-01-31 22:09:33,618 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 531 transitions. Word has length 89 [2022-01-31 22:09:33,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:33,618 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 531 transitions. [2022-01-31 22:09:33,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 531 transitions. [2022-01-31 22:09:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 22:09:33,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:33,620 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1] [2022-01-31 22:09:33,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 22:09:33,621 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:33,621 INFO L85 PathProgramCache]: Analyzing trace with hash 3998338, now seen corresponding path program 1 times [2022-01-31 22:09:33,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:33,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011715198] [2022-01-31 22:09:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:34,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:34,177 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:34,177 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:34,267 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:34,268 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:34,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:34,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:34,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:34,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011715198] [2022-01-31 22:09:34,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2011715198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:34,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:34,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 22:09:34,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737726492] [2022-01-31 22:09:34,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:34,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 22:09:34,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 22:09:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-31 22:09:34,544 INFO L87 Difference]: Start difference. First operand 369 states and 531 transitions. Second operand has 16 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:35,339 INFO L93 Difference]: Finished difference Result 901 states and 1313 transitions. [2022-01-31 22:09:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 22:09:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 22:09:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:35,345 INFO L225 Difference]: With dead ends: 901 [2022-01-31 22:09:35,345 INFO L226 Difference]: Without dead ends: 540 [2022-01-31 22:09:35,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2022-01-31 22:09:35,349 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 822 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:35,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 218 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 22:09:35,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-01-31 22:09:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 475. [2022-01-31 22:09:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 469 states have (on average 1.396588486140725) internal successors, (655), 469 states have internal predecessors, (655), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 660 transitions. [2022-01-31 22:09:35,383 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 660 transitions. Word has length 90 [2022-01-31 22:09:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:35,383 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 660 transitions. [2022-01-31 22:09:35,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 660 transitions. [2022-01-31 22:09:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 22:09:35,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:35,386 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:09:35,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 22:09:35,386 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:35,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1808873363, now seen corresponding path program 1 times [2022-01-31 22:09:35,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:35,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063290750] [2022-01-31 22:09:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:35,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:35,890 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:35,890 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:35,989 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:35,990 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:35,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:36,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:36,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:36,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063290750] [2022-01-31 22:09:36,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1063290750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:36,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:36,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 22:09:36,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070861973] [2022-01-31 22:09:36,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:36,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 22:09:36,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 22:09:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-01-31 22:09:36,922 INFO L87 Difference]: Start difference. First operand 475 states and 660 transitions. Second operand has 25 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:38,146 INFO L93 Difference]: Finished difference Result 1110 states and 1583 transitions. [2022-01-31 22:09:38,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 22:09:38,147 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 22:09:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:38,150 INFO L225 Difference]: With dead ends: 1110 [2022-01-31 22:09:38,150 INFO L226 Difference]: Without dead ends: 625 [2022-01-31 22:09:38,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=1514, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 22:09:38,152 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 372 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:38,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 262 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1751 Invalid, 0 Unknown, 513 Unchecked, 0.8s Time] [2022-01-31 22:09:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-31 22:09:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 563. [2022-01-31 22:09:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 557 states have (on average 1.4039497307001796) internal successors, (782), 557 states have internal predecessors, (782), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 787 transitions. [2022-01-31 22:09:38,195 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 787 transitions. Word has length 92 [2022-01-31 22:09:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:38,196 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 787 transitions. [2022-01-31 22:09:38,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 787 transitions. [2022-01-31 22:09:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 22:09:38,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:38,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-01-31 22:09:38,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 22:09:38,198 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1846437857, now seen corresponding path program 1 times [2022-01-31 22:09:38,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:38,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209172129] [2022-01-31 22:09:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:38,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:38,890 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:38,891 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:38,999 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=3, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:38,999 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:38,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:39,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:39,511 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:39,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209172129] [2022-01-31 22:09:39,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [209172129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:39,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:39,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 22:09:39,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252187181] [2022-01-31 22:09:39,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:39,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 22:09:39,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:39,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 22:09:39,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2022-01-31 22:09:39,513 INFO L87 Difference]: Start difference. First operand 563 states and 787 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:40,810 INFO L93 Difference]: Finished difference Result 1491 states and 2070 transitions. [2022-01-31 22:09:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 22:09:40,811 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 22:09:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:40,815 INFO L225 Difference]: With dead ends: 1491 [2022-01-31 22:09:40,815 INFO L226 Difference]: Without dead ends: 984 [2022-01-31 22:09:40,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=420, Invalid=1560, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 22:09:40,817 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 1178 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:40,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 196 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2188 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 22:09:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-01-31 22:09:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 589. [2022-01-31 22:09:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 583 states have (on average 1.3927958833619212) internal successors, (812), 583 states have internal predecessors, (812), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 817 transitions. [2022-01-31 22:09:40,881 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 817 transitions. Word has length 101 [2022-01-31 22:09:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:40,882 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 817 transitions. [2022-01-31 22:09:40,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 817 transitions. [2022-01-31 22:09:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 22:09:40,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:40,884 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:09:40,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 22:09:40,884 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:40,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:40,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1432757828, now seen corresponding path program 1 times [2022-01-31 22:09:40,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:40,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318144737] [2022-01-31 22:09:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:40,943 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 5 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=3, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:41,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:41,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:41,427 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:41,513 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:41,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 5 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=3, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:41,565 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:41,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:41,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:42,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:42,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318144737] [2022-01-31 22:09:42,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [318144737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:42,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:42,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 22:09:42,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22721677] [2022-01-31 22:09:42,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:42,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 22:09:42,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:42,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 22:09:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-01-31 22:09:42,182 INFO L87 Difference]: Start difference. First operand 589 states and 817 transitions. Second operand has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:43,811 INFO L93 Difference]: Finished difference Result 1227 states and 1689 transitions. [2022-01-31 22:09:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 22:09:43,811 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 22:09:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:43,814 INFO L225 Difference]: With dead ends: 1227 [2022-01-31 22:09:43,814 INFO L226 Difference]: Without dead ends: 694 [2022-01-31 22:09:43,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=2297, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 22:09:43,817 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1277 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:43,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 199 Invalid, 3002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2943 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 22:09:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-01-31 22:09:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 597. [2022-01-31 22:09:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 591 states have (on average 1.38917089678511) internal successors, (821), 591 states have internal predecessors, (821), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 826 transitions. [2022-01-31 22:09:43,878 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 826 transitions. Word has length 114 [2022-01-31 22:09:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:43,878 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 826 transitions. [2022-01-31 22:09:43,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 826 transitions. [2022-01-31 22:09:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 22:09:43,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:43,880 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:09:43,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 22:09:43,880 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:43,881 INFO L85 PathProgramCache]: Analyzing trace with hash 610054600, now seen corresponding path program 1 times [2022-01-31 22:09:43,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:43,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362088713] [2022-01-31 22:09:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:43,886 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:09:43,886 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:09:43,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:43,887 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:09:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:43,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:43,917 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:43,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362088713] [2022-01-31 22:09:43,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1362088713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:43,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:43,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:09:43,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973820498] [2022-01-31 22:09:43,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:43,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:09:43,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:43,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:09:43,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:09:43,918 INFO L87 Difference]: Start difference. First operand 597 states and 826 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:44,164 INFO L93 Difference]: Finished difference Result 1598 states and 2218 transitions. [2022-01-31 22:09:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:09:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 22:09:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:44,169 INFO L225 Difference]: With dead ends: 1598 [2022-01-31 22:09:44,169 INFO L226 Difference]: Without dead ends: 1057 [2022-01-31 22:09:44,171 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 [2022-01-31 22:09:44,171 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 372 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:44,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 375 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 22:09:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-01-31 22:09:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1050. [2022-01-31 22:09:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1044 states have (on average 1.3764367816091954) internal successors, (1437), 1044 states have internal predecessors, (1437), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1442 transitions. [2022-01-31 22:09:44,265 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1442 transitions. Word has length 114 [2022-01-31 22:09:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:44,266 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1442 transitions. [2022-01-31 22:09:44,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1442 transitions. [2022-01-31 22:09:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 22:09:44,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:44,268 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:09:44,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 22:09:44,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:44,269 INFO L85 PathProgramCache]: Analyzing trace with hash 380427612, now seen corresponding path program 1 times [2022-01-31 22:09:44,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:44,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925167767] [2022-01-31 22:09:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:44,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:09:44,274 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:09:44,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:44,275 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:09:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:44,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:44,314 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:44,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925167767] [2022-01-31 22:09:44,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [925167767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:44,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:44,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:09:44,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209619364] [2022-01-31 22:09:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:44,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:09:44,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:09:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:09:44,317 INFO L87 Difference]: Start difference. First operand 1050 states and 1442 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:44,443 INFO L93 Difference]: Finished difference Result 1609 states and 2209 transitions. [2022-01-31 22:09:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:09:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-01-31 22:09:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:44,447 INFO L225 Difference]: With dead ends: 1609 [2022-01-31 22:09:44,447 INFO L226 Difference]: Without dead ends: 1068 [2022-01-31 22:09:44,449 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 [2022-01-31 22:09:44,450 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 370 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:44,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 214 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:09:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-01-31 22:09:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1013. [2022-01-31 22:09:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1007 states have (on average 1.374379344587885) internal successors, (1384), 1007 states have internal predecessors, (1384), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1389 transitions. [2022-01-31 22:09:44,545 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1389 transitions. Word has length 116 [2022-01-31 22:09:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:44,546 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1389 transitions. [2022-01-31 22:09:44,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1389 transitions. [2022-01-31 22:09:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 22:09:44,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:44,548 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:09:44,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 22:09:44,549 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1241926765, now seen corresponding path program 1 times [2022-01-31 22:09:44,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:44,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150538687] [2022-01-31 22:09:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:45,092 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:45,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 5 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=3, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:45,204 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:45,204 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:45,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 5 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=3, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:45,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:45,346 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:45,424 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:45,424 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:45,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:45,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:46,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:46,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150538687] [2022-01-31 22:09:46,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [150538687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:46,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:46,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 22:09:46,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481860498] [2022-01-31 22:09:46,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:46,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 22:09:46,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 22:09:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-31 22:09:46,612 INFO L87 Difference]: Start difference. First operand 1013 states and 1389 transitions. Second operand has 29 states, 28 states have (on average 4.0) internal successors, (112), 27 states have internal predecessors, (112), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:48,681 INFO L93 Difference]: Finished difference Result 2420 states and 3383 transitions. [2022-01-31 22:09:48,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 22:09:48,682 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.0) internal successors, (112), 27 states have internal predecessors, (112), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 22:09:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:48,687 INFO L225 Difference]: With dead ends: 2420 [2022-01-31 22:09:48,687 INFO L226 Difference]: Without dead ends: 1415 [2022-01-31 22:09:48,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=417, Invalid=2553, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 22:09:48,690 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 973 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 716 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:48,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 266 Invalid, 4231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3403 Invalid, 0 Unknown, 716 Unchecked, 1.4s Time] [2022-01-31 22:09:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-01-31 22:09:48,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1120. [2022-01-31 22:09:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1114 states have (on average 1.3913824057450628) internal successors, (1550), 1114 states have internal predecessors, (1550), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1555 transitions. [2022-01-31 22:09:48,809 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1555 transitions. Word has length 117 [2022-01-31 22:09:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:48,809 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1555 transitions. [2022-01-31 22:09:48,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.0) internal successors, (112), 27 states have internal predecessors, (112), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1555 transitions. [2022-01-31 22:09:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 22:09:48,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:48,812 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-01-31 22:09:48,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 22:09:48,812 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:48,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash 644746976, now seen corresponding path program 1 times [2022-01-31 22:09:48,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:48,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318666583] [2022-01-31 22:09:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:48,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:49,311 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:49,404 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:49,405 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:49,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:49,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:49,542 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:49,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:49,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:50,235 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:50,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318666583] [2022-01-31 22:09:50,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1318666583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:50,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:50,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 22:09:50,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653304119] [2022-01-31 22:09:50,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:50,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 22:09:50,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:50,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 22:09:50,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-01-31 22:09:50,237 INFO L87 Difference]: Start difference. First operand 1120 states and 1555 transitions. Second operand has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:52,450 INFO L93 Difference]: Finished difference Result 4497 states and 6250 transitions. [2022-01-31 22:09:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 22:09:52,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 22:09:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:52,461 INFO L225 Difference]: With dead ends: 4497 [2022-01-31 22:09:52,461 INFO L226 Difference]: Without dead ends: 3391 [2022-01-31 22:09:52,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 22:09:52,465 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1627 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3729 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 3795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 3729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:52,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1627 Valid, 214 Invalid, 3795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 3729 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 22:09:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2022-01-31 22:09:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 3165. [2022-01-31 22:09:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 3159 states have (on average 1.3963279518835074) internal successors, (4411), 3159 states have internal predecessors, (4411), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 4416 transitions. [2022-01-31 22:09:52,812 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 4416 transitions. Word has length 127 [2022-01-31 22:09:52,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:09:52,812 INFO L470 AbstractCegarLoop]: Abstraction has 3165 states and 4416 transitions. [2022-01-31 22:09:52,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 4416 transitions. [2022-01-31 22:09:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 22:09:52,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:09:52,818 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1] [2022-01-31 22:09:52,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 22:09:52,818 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:09:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:09:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash 490502430, now seen corresponding path program 1 times [2022-01-31 22:09:52,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:09:52,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154381243] [2022-01-31 22:09:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:09:52,882 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:55,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 9 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:56,056 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:56,057 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:56,186 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:56,236 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:09:56,236 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:09:56,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:09:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:56,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:09:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:09:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:09:57,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:09:57,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154381243] [2022-01-31 22:09:57,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [154381243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:09:57,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:09:57,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 22:09:57,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915181911] [2022-01-31 22:09:57,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:09:57,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 22:09:57,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:09:57,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 22:09:57,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-01-31 22:09:57,026 INFO L87 Difference]: Start difference. First operand 3165 states and 4416 transitions. Second operand has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:09:59,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:09:59,542 INFO L93 Difference]: Finished difference Result 12955 states and 18104 transitions. [2022-01-31 22:09:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 22:09:59,543 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-01-31 22:09:59,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:09:59,570 INFO L225 Difference]: With dead ends: 12955 [2022-01-31 22:09:59,571 INFO L226 Difference]: Without dead ends: 9804 [2022-01-31 22:09:59,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=540, Invalid=2430, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 22:09:59,579 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 1536 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2913 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 22:09:59,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1536 Valid, 196 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2913 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 22:09:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9804 states. [2022-01-31 22:10:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9804 to 9177. [2022-01-31 22:10:00,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9171 states have (on average 1.410097045033257) internal successors, (12932), 9171 states have internal predecessors, (12932), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:10:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 12937 transitions. [2022-01-31 22:10:00,438 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 12937 transitions. Word has length 128 [2022-01-31 22:10:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:10:00,438 INFO L470 AbstractCegarLoop]: Abstraction has 9177 states and 12937 transitions. [2022-01-31 22:10:00,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.206896551724138) internal successors, (122), 28 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:10:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 12937 transitions. [2022-01-31 22:10:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 22:10:00,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:10:00,449 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:10:00,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 22:10:00,449 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:10:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:10:00,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1731516901, now seen corresponding path program 1 times [2022-01-31 22:10:00,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:10:00,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362127180] [2022-01-31 22:10:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:10:31,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:10:31,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:10:31,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:10:31,771 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:11:02,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:11:02,320 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:11:02,321 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:11:02,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:11:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:11:02,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:11:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:11:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:11:03,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:11:03,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362127180] [2022-01-31 22:11:03,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [362127180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:11:03,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:11:03,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 22:11:03,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265229141] [2022-01-31 22:11:03,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:11:03,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 22:11:03,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:11:03,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 22:11:03,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-01-31 22:11:03,248 INFO L87 Difference]: Start difference. First operand 9177 states and 12937 transitions. Second operand has 30 states, 29 states have (on average 4.586206896551724) internal successors, (133), 28 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:11:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:11:07,146 INFO L93 Difference]: Finished difference Result 20606 states and 28497 transitions. [2022-01-31 22:11:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 22:11:07,147 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.586206896551724) internal successors, (133), 28 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-01-31 22:11:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:11:07,184 INFO L225 Difference]: With dead ends: 20606 [2022-01-31 22:11:07,185 INFO L226 Difference]: Without dead ends: 11363 [2022-01-31 22:11:07,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=434, Invalid=2758, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 22:11:07,202 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 924 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4948 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 5037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 4948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:11:07,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 285 Invalid, 5037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 4948 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 22:11:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11363 states. [2022-01-31 22:11:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11363 to 9226. [2022-01-31 22:11:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9226 states, 9220 states have (on average 1.4135574837310194) internal successors, (13033), 9220 states have internal predecessors, (13033), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:11:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9226 states to 9226 states and 13038 transitions. [2022-01-31 22:11:08,070 INFO L78 Accepts]: Start accepts. Automaton has 9226 states and 13038 transitions. Word has length 138 [2022-01-31 22:11:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:11:08,070 INFO L470 AbstractCegarLoop]: Abstraction has 9226 states and 13038 transitions. [2022-01-31 22:11:08,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.586206896551724) internal successors, (133), 28 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:11:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 9226 states and 13038 transitions. [2022-01-31 22:11:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 22:11:08,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:11:08,081 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:11:08,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 22:11:08,081 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:11:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:11:08,081 INFO L85 PathProgramCache]: Analyzing trace with hash 719331811, now seen corresponding path program 1 times [2022-01-31 22:11:08,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:11:08,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154777473] [2022-01-31 22:11:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:11:38,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:11:38,936 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:11:39,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:11:39,342 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:12:09,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:12:09,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:12:09,899 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:12:09,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:12:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:12:09,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:12:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:12:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:12:10,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:12:10,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154777473] [2022-01-31 22:12:10,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154777473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:12:10,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:12:10,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 22:12:10,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486641724] [2022-01-31 22:12:10,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:12:10,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 22:12:10,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:12:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 22:12:10,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-31 22:12:10,407 INFO L87 Difference]: Start difference. First operand 9226 states and 13038 transitions. Second operand has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 22 states have internal predecessors, (132), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:12:12,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:12:12,866 INFO L93 Difference]: Finished difference Result 16019 states and 22123 transitions. [2022-01-31 22:12:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 22:12:12,867 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 22 states have internal predecessors, (132), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 22:12:12,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:12:12,889 INFO L225 Difference]: With dead ends: 16019 [2022-01-31 22:12:12,889 INFO L226 Difference]: Without dead ends: 11043 [2022-01-31 22:12:12,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 22:12:12,900 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 893 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 22:12:12,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 230 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 22:12:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2022-01-31 22:12:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 9272. [2022-01-31 22:12:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9272 states, 9266 states have (on average 1.4119361105115475) internal successors, (13083), 9266 states have internal predecessors, (13083), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:12:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9272 states to 9272 states and 13088 transitions. [2022-01-31 22:12:13,765 INFO L78 Accepts]: Start accepts. Automaton has 9272 states and 13088 transitions. Word has length 139 [2022-01-31 22:12:13,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:12:13,766 INFO L470 AbstractCegarLoop]: Abstraction has 9272 states and 13088 transitions. [2022-01-31 22:12:13,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 22 states have internal predecessors, (132), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:12:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states and 13088 transitions. [2022-01-31 22:12:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 22:12:13,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:12:13,775 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:12:13,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 22:12:13,776 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:12:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:12:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash -254094625, now seen corresponding path program 1 times [2022-01-31 22:12:13,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:12:13,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641986886] [2022-01-31 22:12:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:12:44,441 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:12:47,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 9 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:12:47,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:12:47,446 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:12:47,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=5, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:13:18,042 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:13:18,042 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:13:18,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:13:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:13:18,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:13:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:13:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:13:18,744 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:13:18,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641986886] [2022-01-31 22:13:18,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1641986886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:13:18,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:13:18,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 22:13:18,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483174520] [2022-01-31 22:13:18,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:13:18,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 22:13:18,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:13:18,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 22:13:18,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-01-31 22:13:18,746 INFO L87 Difference]: Start difference. First operand 9272 states and 13088 transitions. Second operand has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 23 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:13:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:13:21,376 INFO L93 Difference]: Finished difference Result 16410 states and 22523 transitions. [2022-01-31 22:13:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 22:13:21,377 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 23 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 22:13:21,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:13:21,401 INFO L225 Difference]: With dead ends: 16410 [2022-01-31 22:13:21,401 INFO L226 Difference]: Without dead ends: 11388 [2022-01-31 22:13:21,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 22:13:21,416 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 887 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:13:21,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 235 Invalid, 2409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 22:13:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11388 states. [2022-01-31 22:13:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11388 to 9318. [2022-01-31 22:13:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9318 states, 9312 states have (on average 1.4101159793814433) internal successors, (13131), 9312 states have internal predecessors, (13131), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:13:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9318 states to 9318 states and 13136 transitions. [2022-01-31 22:13:22,436 INFO L78 Accepts]: Start accepts. Automaton has 9318 states and 13136 transitions. Word has length 139 [2022-01-31 22:13:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:13:22,436 INFO L470 AbstractCegarLoop]: Abstraction has 9318 states and 13136 transitions. [2022-01-31 22:13:22,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 23 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:13:22,437 INFO L276 IsEmpty]: Start isEmpty. Operand 9318 states and 13136 transitions. [2022-01-31 22:13:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 22:13:22,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:13:22,445 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:13:22,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 22:13:22,446 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:13:22,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:13:22,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1587195881, now seen corresponding path program 1 times [2022-01-31 22:13:22,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:13:22,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769155996] [2022-01-31 22:13:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:13:53,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:13:56,186 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 9 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:13:56,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:13:56,273 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:14:26,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:14:26,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=5, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:14:26,860 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:14:26,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:26,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:27,589 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769155996] [2022-01-31 22:14:27,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1769155996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:27,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:27,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 22:14:27,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779064615] [2022-01-31 22:14:27,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:27,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 22:14:27,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 22:14:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-01-31 22:14:27,593 INFO L87 Difference]: Start difference. First operand 9318 states and 13136 transitions. Second operand has 26 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:30,546 INFO L93 Difference]: Finished difference Result 16480 states and 22594 transitions. [2022-01-31 22:14:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 22:14:30,547 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 22:14:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:30,567 INFO L225 Difference]: With dead ends: 16480 [2022-01-31 22:14:30,567 INFO L226 Difference]: Without dead ends: 11412 [2022-01-31 22:14:30,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=420, Invalid=1932, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 22:14:30,579 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 871 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:30,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 259 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2991 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 22:14:30,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11412 states. [2022-01-31 22:14:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11412 to 9319. [2022-01-31 22:14:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9319 states, 9313 states have (on average 1.410071942446043) internal successors, (13132), 9313 states have internal predecessors, (13132), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9319 states to 9319 states and 13137 transitions. [2022-01-31 22:14:31,442 INFO L78 Accepts]: Start accepts. Automaton has 9319 states and 13137 transitions. Word has length 140 [2022-01-31 22:14:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:31,442 INFO L470 AbstractCegarLoop]: Abstraction has 9319 states and 13137 transitions. [2022-01-31 22:14:31,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9319 states and 13137 transitions. [2022-01-31 22:14:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 22:14:31,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:31,451 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:31,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 22:14:31,452 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1079883807, now seen corresponding path program 2 times [2022-01-31 22:14:31,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807488729] [2022-01-31 22:14:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:15:02,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:15:02,414 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:15:02,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 8 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=6, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:15:02,808 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:15:33,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:15:33,435 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:15:33,435 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:15:33,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:15:33,517 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:15:33,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:15:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:15:33,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:15:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:15:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:15:34,379 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:15:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807488729] [2022-01-31 22:15:34,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [807488729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:15:34,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:15:34,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 22:15:34,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280214037] [2022-01-31 22:15:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:15:34,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 22:15:34,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:15:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 22:15:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-01-31 22:15:34,381 INFO L87 Difference]: Start difference. First operand 9319 states and 13137 transitions. Second operand has 31 states, 30 states have (on average 4.5) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:15:37,847 INFO L93 Difference]: Finished difference Result 16213 states and 22326 transitions. [2022-01-31 22:15:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 22:15:37,847 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.5) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 22:15:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:15:37,865 INFO L225 Difference]: With dead ends: 16213 [2022-01-31 22:15:37,865 INFO L226 Difference]: Without dead ends: 11144 [2022-01-31 22:15:37,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=388, Invalid=3034, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 22:15:37,878 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 825 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3567 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 3635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 22:15:37,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 252 Invalid, 3635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3567 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 22:15:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11144 states. [2022-01-31 22:15:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11144 to 9386. [2022-01-31 22:15:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9386 states, 9380 states have (on average 1.4072494669509594) internal successors, (13200), 9380 states have internal predecessors, (13200), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9386 states to 9386 states and 13205 transitions. [2022-01-31 22:15:38,804 INFO L78 Accepts]: Start accepts. Automaton has 9386 states and 13205 transitions. Word has length 140 [2022-01-31 22:15:38,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:15:38,805 INFO L470 AbstractCegarLoop]: Abstraction has 9386 states and 13205 transitions. [2022-01-31 22:15:38,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.5) internal successors, (135), 29 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 9386 states and 13205 transitions. [2022-01-31 22:15:38,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 22:15:38,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:15:38,814 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:15:38,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 22:15:38,814 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:15:38,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:15:38,814 INFO L85 PathProgramCache]: Analyzing trace with hash -925328543, now seen corresponding path program 2 times [2022-01-31 22:15:38,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:15:38,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031047887] [2022-01-31 22:15:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:15:38,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=5, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:15:38,975 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 22:16:09,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:16:09,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:16:09,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:16:09,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 22:16:09,809 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 22:16:09,809 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:16:09,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=5, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:22:12,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 10 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=10}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:22:12,134 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:22:12,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:22:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:22:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:22:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:22:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:22:13,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:22:13,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031047887] [2022-01-31 22:22:13,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031047887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:22:13,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:22:13,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 22:22:13,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106689769] [2022-01-31 22:22:13,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:22:13,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 22:22:13,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:22:13,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 22:22:13,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 22:22:13,836 INFO L87 Difference]: Start difference. First operand 9386 states and 13205 transitions. Second operand has 32 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:22:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:22:18,946 INFO L93 Difference]: Finished difference Result 29838 states and 42603 transitions. [2022-01-31 22:22:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 22:22:18,947 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 22:22:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:22:18,983 INFO L225 Difference]: With dead ends: 29838 [2022-01-31 22:22:18,983 INFO L226 Difference]: Without dead ends: 20466 [2022-01-31 22:22:19,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 28 SyntacticMatches, 43 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=466, Invalid=3316, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 22:22:19,007 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 1598 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6326 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 6447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 6326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 22:22:19,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1598 Valid, 296 Invalid, 6447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 6326 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 22:22:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20466 states. [2022-01-31 22:22:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20466 to 10152. [2022-01-31 22:22:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10152 states, 10146 states have (on average 1.4081411393652672) internal successors, (14287), 10146 states have internal predecessors, (14287), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:22:20,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10152 states to 10152 states and 14292 transitions. [2022-01-31 22:22:20,281 INFO L78 Accepts]: Start accepts. Automaton has 10152 states and 14292 transitions. Word has length 140 [2022-01-31 22:22:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:22:20,281 INFO L470 AbstractCegarLoop]: Abstraction has 10152 states and 14292 transitions. [2022-01-31 22:22:20,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.354838709677419) internal successors, (135), 30 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:22:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10152 states and 14292 transitions. [2022-01-31 22:22:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 22:22:20,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:22:20,288 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:22:20,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 22:22:20,288 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:22:20,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:22:20,288 INFO L85 PathProgramCache]: Analyzing trace with hash 432201773, now seen corresponding path program 2 times [2022-01-31 22:22:20,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:22:20,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318772344] [2022-01-31 22:22:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:22:51,128 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:22:54,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 9 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:22:54,155 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 6 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=4, 2=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:22:54,156 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:23:24,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 9 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=7, 2=1}, 1={1=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:23:24,814 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:23:24,815 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:23:24,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 7 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=7}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 22:23:24,944 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 22:23:24,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:23:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:23:25,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:23:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:23:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:23:25,715 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:23:25,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318772344] [2022-01-31 22:23:25,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [318772344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:23:25,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:23:25,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 22:23:25,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293573910] [2022-01-31 22:23:25,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:23:25,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 22:23:25,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:23:25,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 22:23:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-31 22:23:25,716 INFO L87 Difference]: Start difference. First operand 10152 states and 14292 transitions. Second operand has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 25 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:23:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:23:28,681 INFO L93 Difference]: Finished difference Result 15798 states and 22130 transitions. [2022-01-31 22:23:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 22:23:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 25 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 22:23:28,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:23:28,695 INFO L225 Difference]: With dead ends: 15798 [2022-01-31 22:23:28,695 INFO L226 Difference]: Without dead ends: 10322 [2022-01-31 22:23:28,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 65 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=420, Invalid=2232, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 22:23:28,708 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 1408 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3378 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 22:23:28,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1408 Valid, 250 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3378 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 22:23:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10322 states. [2022-01-31 22:23:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10322 to 10179. [2022-01-31 22:23:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10179 states, 10173 states have (on average 1.4072544971984666) internal successors, (14316), 10173 states have internal predecessors, (14316), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:23:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10179 states to 10179 states and 14321 transitions. [2022-01-31 22:23:29,908 INFO L78 Accepts]: Start accepts. Automaton has 10179 states and 14321 transitions. Word has length 141 [2022-01-31 22:23:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:23:29,908 INFO L470 AbstractCegarLoop]: Abstraction has 10179 states and 14321 transitions. [2022-01-31 22:23:29,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 25 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:23:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 10179 states and 14321 transitions. [2022-01-31 22:23:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 22:23:29,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:23:29,917 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:23:29,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 22:23:29,918 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:23:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:23:29,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1290392525, now seen corresponding path program 1 times [2022-01-31 22:23:29,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:23:29,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982458178] [2022-01-31 22:23:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY