/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/array-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:25:55,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:25:55,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:25:55,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:25:55,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 18:25:55,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 18:25:55,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 18:25:55,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 18:25:55,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 18:25:55,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 18:25:55,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 18:25:55,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 18:25:55,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 18:25:55,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 18:25:55,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 18:25:55,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 18:25:55,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 18:25:55,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:25:55,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:25:55,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:25:55,162 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 18:25:55,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:25:55,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:25:55,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:25:55,173 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:25:55,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:25:55,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:25:55,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:25:55,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:25:55,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:25:55,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:25:55,174 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:25:55,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:25:55,174 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:25:55,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:25:55,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:25:55,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:25:55,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:25:55,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:25:55,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:25:55,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:25:55,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:25:55,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:25:55,175 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:25:55,175 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:25:55,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:25:55,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:25:55,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:25:55,379 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:25:55,381 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:25:55,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-01-31 18:25:55,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd9dc7dfa/a9c385500a4e405c86ca564aabf30fc6/FLAGd6f93ef05 [2022-01-31 18:25:55,787 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:25:55,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-01-31 18:25:55,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd9dc7dfa/a9c385500a4e405c86ca564aabf30fc6/FLAGd6f93ef05 [2022-01-31 18:25:55,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd9dc7dfa/a9c385500a4e405c86ca564aabf30fc6 [2022-01-31 18:25:55,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:25:55,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:25:55,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:25:55,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:25:55,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:25:55,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:25:55" (1/1) ... [2022-01-31 18:25:55,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a10377c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55, skipping insertion in model container [2022-01-31 18:25:55,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:25:55" (1/1) ... [2022-01-31 18:25:55,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:25:55,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:25:55,896 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-01-31 18:25:55,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:25:55,945 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:25:55,952 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-01-31 18:25:55,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:25:55,967 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:25:55,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55 WrapperNode [2022-01-31 18:25:55,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:25:55,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:25:55,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:25:55,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:25:55,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55" (1/1) ... [2022-01-31 18:25:55,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55" (1/1) ... [2022-01-31 18:25:55,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55" (1/1) ... [2022-01-31 18:25:55,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55" (1/1) ... [2022-01-31 18:25:55,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55" (1/1) ... [2022-01-31 18:25:55,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55" (1/1) ... [2022-01-31 18:25:55,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55" (1/1) ... [2022-01-31 18:25:55,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:25:55,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:25:55,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:25:55,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:25:55,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55" (1/1) ... [2022-01-31 18:25:55,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:25:56,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:25:56,014 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 18:25:56,020 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 18:25:56,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:25:56,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:25:56,047 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:25:56,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 18:25:56,048 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2022-01-31 18:25:56,048 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2022-01-31 18:25:56,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:25:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:25:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:25:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:25:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:25:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 18:25:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 18:25:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2022-01-31 18:25:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:25:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2022-01-31 18:25:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:25:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:25:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 18:25:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:25:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:25:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:25:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:25:56,099 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:25:56,100 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:25:56,286 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:25:56,290 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:25:56,291 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-31 18:25:56,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:25:56 BoogieIcfgContainer [2022-01-31 18:25:56,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:25:56,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:25:56,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:25:56,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:25:56,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:25:55" (1/3) ... [2022-01-31 18:25:56,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c7cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:25:56, skipping insertion in model container [2022-01-31 18:25:56,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:25:55" (2/3) ... [2022-01-31 18:25:56,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c7cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:25:56, skipping insertion in model container [2022-01-31 18:25:56,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:25:56" (3/3) ... [2022-01-31 18:25:56,300 INFO L111 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2022-01-31 18:25:56,303 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:25:56,304 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:25:56,352 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:25:56,359 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 18:25:56,359 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:25:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 38 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 18:25:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 18:25:56,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:56,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:56,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:56,398 INFO L85 PathProgramCache]: Analyzing trace with hash 29373732, now seen corresponding path program 1 times [2022-01-31 18:25:56,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:56,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735481560] [2022-01-31 18:25:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:56,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:56,454 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:56,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:56,572 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 18:25:56,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:56,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735481560] [2022-01-31 18:25:56,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1735481560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:56,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:56,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 18:25:56,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367528400] [2022-01-31 18:25:56,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:56,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 18:25:56,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:56,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 18:25:56,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:25:56,595 INFO L87 Difference]: Start difference. First operand has 49 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 38 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:56,643 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2022-01-31 18:25:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 18:25:56,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 18:25:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:56,649 INFO L225 Difference]: With dead ends: 90 [2022-01-31 18:25:56,649 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 18:25:56,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:25:56,655 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:56,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:25:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 18:25:56,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 18:25:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:25:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-31 18:25:56,683 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 18 [2022-01-31 18:25:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:56,683 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-31 18:25:56,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-31 18:25:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 18:25:56,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:56,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:56,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:25:56,685 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:56,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:56,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2092387303, now seen corresponding path program 1 times [2022-01-31 18:25:56,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:56,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472923697] [2022-01-31 18:25:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:56,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:56,687 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:56,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:56,768 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 18:25:56,768 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:56,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472923697] [2022-01-31 18:25:56,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [472923697] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:56,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:56,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:25:56,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403355703] [2022-01-31 18:25:56,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:56,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:25:56,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:25:56,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:25:56,771 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:56,933 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2022-01-31 18:25:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:25:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 18:25:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:56,937 INFO L225 Difference]: With dead ends: 91 [2022-01-31 18:25:56,937 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 18:25:56,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:25:56,942 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 101 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:56,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 40 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:25:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 18:25:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2022-01-31 18:25:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:25:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-01-31 18:25:56,973 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 18 [2022-01-31 18:25:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:56,974 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-01-31 18:25:56,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-01-31 18:25:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 18:25:56,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:56,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:56,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:25:56,975 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:56,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1216477349, now seen corresponding path program 1 times [2022-01-31 18:25:56,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:56,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75260144] [2022-01-31 18:25:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:56,989 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:56,989 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:56,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:56,992 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:57,079 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:57,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75260144] [2022-01-31 18:25:57,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [75260144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:57,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:57,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:25:57,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413894582] [2022-01-31 18:25:57,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:57,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:25:57,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:25:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:25:57,080 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:57,181 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-31 18:25:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:25:57,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 18:25:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:57,183 INFO L225 Difference]: With dead ends: 70 [2022-01-31 18:25:57,183 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 18:25:57,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:25:57,188 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 95 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:57,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 41 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:25:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 18:25:57,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-01-31 18:25:57,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:25:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-01-31 18:25:57,208 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 20 [2022-01-31 18:25:57,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:57,209 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-01-31 18:25:57,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:57,209 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-01-31 18:25:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 18:25:57,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:57,210 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] [2022-01-31 18:25:57,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:25:57,211 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1281070043, now seen corresponding path program 1 times [2022-01-31 18:25:57,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:57,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807377419] [2022-01-31 18:25:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:57,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:57,216 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:57,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:57,218 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 18:25:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:57,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:57,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807377419] [2022-01-31 18:25:57,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [807377419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:57,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:57,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:25:57,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681488682] [2022-01-31 18:25:57,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:57,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:25:57,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:57,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:25:57,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:25:57,299 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:25:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:57,407 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2022-01-31 18:25:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:25:57,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-31 18:25:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:57,409 INFO L225 Difference]: With dead ends: 85 [2022-01-31 18:25:57,409 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 18:25:57,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:25:57,414 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:57,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 50 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:25:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 18:25:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-31 18:25:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 18:25:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-01-31 18:25:57,427 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 30 [2022-01-31 18:25:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:57,427 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-01-31 18:25:57,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:25:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-01-31 18:25:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 18:25:57,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:57,429 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] [2022-01-31 18:25:57,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:25:57,429 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:57,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:57,432 INFO L85 PathProgramCache]: Analyzing trace with hash 704321294, now seen corresponding path program 1 times [2022-01-31 18:25:57,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:57,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779817142] [2022-01-31 18:25:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:57,434 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:57,434 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:57,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:57,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 18:25:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,518 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 18:25:57,519 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:57,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779817142] [2022-01-31 18:25:57,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779817142] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:57,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:57,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:25:57,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505169604] [2022-01-31 18:25:57,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:57,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:25:57,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:25:57,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:25:57,523 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:57,668 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2022-01-31 18:25:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:25:57,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-01-31 18:25:57,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:57,673 INFO L225 Difference]: With dead ends: 98 [2022-01-31 18:25:57,673 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 18:25:57,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:25:57,674 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:57,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 56 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:25:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 18:25:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-01-31 18:25:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 44 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:25:57,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-01-31 18:25:57,681 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 30 [2022-01-31 18:25:57,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:57,681 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-01-31 18:25:57,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:57,681 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-01-31 18:25:57,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 18:25:57,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:57,683 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] [2022-01-31 18:25:57,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:25:57,683 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:57,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:57,683 INFO L85 PathProgramCache]: Analyzing trace with hash -605894808, now seen corresponding path program 1 times [2022-01-31 18:25:57,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:57,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262212755] [2022-01-31 18:25:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:57,685 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:57,685 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:57,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:57,686 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 18:25:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 18:25:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,730 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 18:25:57,730 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262212755] [2022-01-31 18:25:57,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [262212755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:57,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:57,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:25:57,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423069797] [2022-01-31 18:25:57,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:57,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:25:57,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:25:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:25:57,732 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 18:25:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:57,838 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-01-31 18:25:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:25:57,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-01-31 18:25:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:57,840 INFO L225 Difference]: With dead ends: 72 [2022-01-31 18:25:57,840 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 18:25:57,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:25:57,841 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 75 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:57,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 39 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:25:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 18:25:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 18:25:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:25:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-31 18:25:57,858 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 35 [2022-01-31 18:25:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:57,859 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-31 18:25:57,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 18:25:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-31 18:25:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 18:25:57,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:57,861 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] [2022-01-31 18:25:57,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:25:57,861 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash -785338614, now seen corresponding path program 1 times [2022-01-31 18:25:57,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:57,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264412395] [2022-01-31 18:25:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:57,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:57,864 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:57,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:57,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 18:25:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 18:25:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,950 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 18:25:57,950 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:57,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264412395] [2022-01-31 18:25:57,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [264412395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:57,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:57,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:25:57,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321416343] [2022-01-31 18:25:57,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:57,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:25:57,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:25:57,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:25:57,952 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:58,120 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2022-01-31 18:25:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 18:25:58,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-01-31 18:25:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:58,122 INFO L225 Difference]: With dead ends: 95 [2022-01-31 18:25:58,123 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 18:25:58,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:25:58,123 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 135 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:58,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 34 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:25:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 18:25:58,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2022-01-31 18:25:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.24) internal successors, (62), 52 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:25:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-01-31 18:25:58,134 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 39 [2022-01-31 18:25:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:58,134 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-01-31 18:25:58,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-01-31 18:25:58,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 18:25:58,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:58,139 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] [2022-01-31 18:25:58,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:25:58,141 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:58,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:58,142 INFO L85 PathProgramCache]: Analyzing trace with hash 730700744, now seen corresponding path program 1 times [2022-01-31 18:25:58,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:58,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921707627] [2022-01-31 18:25:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:58,143 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:58,143 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:58,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:58,144 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 18:25:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 18:25:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,221 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 18:25:58,221 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:58,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921707627] [2022-01-31 18:25:58,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1921707627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:58,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:58,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:25:58,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218148964] [2022-01-31 18:25:58,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:58,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:25:58,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:58,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:25:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:25:58,222 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:58,376 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2022-01-31 18:25:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 18:25:58,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-01-31 18:25:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:58,377 INFO L225 Difference]: With dead ends: 133 [2022-01-31 18:25:58,377 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 18:25:58,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:25:58,378 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 131 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:58,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 34 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:25:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 18:25:58,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2022-01-31 18:25:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 54 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:25:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-01-31 18:25:58,386 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 41 [2022-01-31 18:25:58,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:58,386 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-01-31 18:25:58,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-01-31 18:25:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 18:25:58,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:58,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:58,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:25:58,387 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2056143290, now seen corresponding path program 2 times [2022-01-31 18:25:58,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:58,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67947726] [2022-01-31 18:25:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:58,389 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:58,389 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:58,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:58,390 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 18:25:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 18:25:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,443 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 18:25:58,443 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67947726] [2022-01-31 18:25:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [67947726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:58,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:58,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:25:58,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700841004] [2022-01-31 18:25:58,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:58,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:25:58,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:25:58,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:25:58,444 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:58,667 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2022-01-31 18:25:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 18:25:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-01-31 18:25:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:58,668 INFO L225 Difference]: With dead ends: 145 [2022-01-31 18:25:58,669 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 18:25:58,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:25:58,671 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 149 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:58,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 36 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:25:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 18:25:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 67. [2022-01-31 18:25:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 56 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:25:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-01-31 18:25:58,693 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 43 [2022-01-31 18:25:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:58,693 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-01-31 18:25:58,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-01-31 18:25:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 18:25:58,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:58,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:58,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:25:58,694 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:58,695 INFO L85 PathProgramCache]: Analyzing trace with hash -153667260, now seen corresponding path program 3 times [2022-01-31 18:25:58,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:58,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773419851] [2022-01-31 18:25:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:58,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:58,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:58,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:58,699 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 18:25:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 18:25:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:58,772 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 18:25:58,772 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:58,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773419851] [2022-01-31 18:25:58,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773419851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:58,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:58,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 18:25:58,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829342619] [2022-01-31 18:25:58,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:58,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 18:25:58,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 18:25:58,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:25:58,774 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:59,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:59,038 INFO L93 Difference]: Finished difference Result 157 states and 190 transitions. [2022-01-31 18:25:59,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 18:25:59,038 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-01-31 18:25:59,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:59,039 INFO L225 Difference]: With dead ends: 157 [2022-01-31 18:25:59,039 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 18:25:59,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:25:59,040 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 190 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:59,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 35 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:25:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 18:25:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 69. [2022-01-31 18:25:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 58 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:25:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2022-01-31 18:25:59,048 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 45 [2022-01-31 18:25:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:59,048 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2022-01-31 18:25:59,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2022-01-31 18:25:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 18:25:59,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:59,049 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:59,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:25:59,049 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1530270526, now seen corresponding path program 4 times [2022-01-31 18:25:59,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:59,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058807839] [2022-01-31 18:25:59,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:59,051 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:59,051 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:59,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:59,052 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 18:25:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 18:25:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:59,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:59,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058807839] [2022-01-31 18:25:59,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2058807839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:59,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:59,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 18:25:59,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147940062] [2022-01-31 18:25:59,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:59,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 18:25:59,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 18:25:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:25:59,126 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:59,393 INFO L93 Difference]: Finished difference Result 169 states and 205 transitions. [2022-01-31 18:25:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 18:25:59,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-01-31 18:25:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:59,395 INFO L225 Difference]: With dead ends: 169 [2022-01-31 18:25:59,395 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 18:25:59,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:25:59,395 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 213 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:59,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 36 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:25:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 18:25:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 71. [2022-01-31 18:25:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:25:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-01-31 18:25:59,404 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 47 [2022-01-31 18:25:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:59,404 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-01-31 18:25:59,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-01-31 18:25:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 18:25:59,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:59,405 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:59,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:25:59,405 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:59,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1596081984, now seen corresponding path program 5 times [2022-01-31 18:25:59,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:59,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171148602] [2022-01-31 18:25:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:59,407 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:59,407 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:59,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:59,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 18:25:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 18:25:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:59,476 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:59,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171148602] [2022-01-31 18:25:59,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [171148602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:59,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:59,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 18:25:59,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331641020] [2022-01-31 18:25:59,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:59,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 18:25:59,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:59,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 18:25:59,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:25:59,477 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:59,785 INFO L93 Difference]: Finished difference Result 181 states and 220 transitions. [2022-01-31 18:25:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:25:59,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-01-31 18:25:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:59,786 INFO L225 Difference]: With dead ends: 181 [2022-01-31 18:25:59,787 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 18:25:59,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:25:59,787 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 260 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:59,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 34 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:25:59,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 18:25:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 73. [2022-01-31 18:25:59,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.2) internal successors, (72), 62 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:25:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-01-31 18:25:59,796 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 49 [2022-01-31 18:25:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:59,796 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-01-31 18:25:59,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:25:59,796 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-01-31 18:25:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 18:25:59,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:59,797 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:59,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:25:59,797 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:59,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:59,797 INFO L85 PathProgramCache]: Analyzing trace with hash -416383682, now seen corresponding path program 6 times [2022-01-31 18:25:59,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:59,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102954337] [2022-01-31 18:25:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:59,799 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:59,799 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:59,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:59,800 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 18:25:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 18:25:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:59,885 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 18:25:59,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:59,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102954337] [2022-01-31 18:25:59,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2102954337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:59,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:59,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:25:59,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377258608] [2022-01-31 18:25:59,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:59,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:25:59,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:25:59,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:25:59,887 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:00,177 INFO L93 Difference]: Finished difference Result 193 states and 235 transitions. [2022-01-31 18:26:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:26:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-01-31 18:26:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:00,189 INFO L225 Difference]: With dead ends: 193 [2022-01-31 18:26:00,189 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 18:26:00,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:26:00,190 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 298 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:00,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 34 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:26:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 18:26:00,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 75. [2022-01-31 18:26:00,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 64 states have internal predecessors, (74), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:00,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-01-31 18:26:00,200 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 51 [2022-01-31 18:26:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:00,200 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-01-31 18:26:00,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-01-31 18:26:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 18:26:00,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:00,201 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:00,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:26:00,201 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:00,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:00,201 INFO L85 PathProgramCache]: Analyzing trace with hash -597681604, now seen corresponding path program 7 times [2022-01-31 18:26:00,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:00,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179488170] [2022-01-31 18:26:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:00,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:00,203 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:00,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:00,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:00,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:00,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 18:26:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:00,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 18:26:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:00,285 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179488170] [2022-01-31 18:26:00,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1179488170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:00,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:00,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 18:26:00,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577277571] [2022-01-31 18:26:00,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:00,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 18:26:00,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 18:26:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:26:00,286 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:00,637 INFO L93 Difference]: Finished difference Result 205 states and 250 transitions. [2022-01-31 18:26:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:26:00,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-01-31 18:26:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:00,638 INFO L225 Difference]: With dead ends: 205 [2022-01-31 18:26:00,638 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 18:26:00,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:26:00,639 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 340 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:00,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 34 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:26:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 18:26:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 77. [2022-01-31 18:26:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 64 states have (on average 1.1875) internal successors, (76), 66 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-01-31 18:26:00,649 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 53 [2022-01-31 18:26:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:00,649 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-01-31 18:26:00,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-01-31 18:26:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 18:26:00,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:00,649 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:00,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:26:00,650 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1268674490, now seen corresponding path program 8 times [2022-01-31 18:26:00,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:00,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235071] [2022-01-31 18:26:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:00,651 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:00,651 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:00,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:00,653 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:00,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:00,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 18:26:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:00,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 18:26:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:00,748 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 18:26:00,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:00,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235071] [2022-01-31 18:26:00,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [235071] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:00,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:00,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:26:00,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614917426] [2022-01-31 18:26:00,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:00,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:26:00,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:00,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:26:00,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:26:00,750 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:01,136 INFO L93 Difference]: Finished difference Result 217 states and 265 transitions. [2022-01-31 18:26:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 18:26:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-01-31 18:26:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:01,137 INFO L225 Difference]: With dead ends: 217 [2022-01-31 18:26:01,137 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 18:26:01,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=521, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:26:01,138 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 347 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:01,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 35 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:26:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 18:26:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 79. [2022-01-31 18:26:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 68 states have internal predecessors, (78), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2022-01-31 18:26:01,161 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 55 [2022-01-31 18:26:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:01,162 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2022-01-31 18:26:01,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2022-01-31 18:26:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 18:26:01,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:01,162 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:01,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:26:01,163 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash -459448904, now seen corresponding path program 9 times [2022-01-31 18:26:01,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:01,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855591841] [2022-01-31 18:26:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:01,165 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:01,165 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:01,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:01,166 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:01,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:01,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 18:26:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:01,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 18:26:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:01,282 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 18:26:01,282 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:01,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855591841] [2022-01-31 18:26:01,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855591841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:01,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:01,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:26:01,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603633413] [2022-01-31 18:26:01,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:01,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:26:01,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:01,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:26:01,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:26:01,284 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:01,733 INFO L93 Difference]: Finished difference Result 229 states and 280 transitions. [2022-01-31 18:26:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 18:26:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-01-31 18:26:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:01,735 INFO L225 Difference]: With dead ends: 229 [2022-01-31 18:26:01,735 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 18:26:01,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:26:01,736 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 363 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:01,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 36 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:26:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 18:26:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 81. [2022-01-31 18:26:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 70 states have internal predecessors, (80), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-01-31 18:26:01,747 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 57 [2022-01-31 18:26:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:01,747 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-01-31 18:26:01,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-01-31 18:26:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 18:26:01,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:01,748 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:01,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:26:01,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:01,748 INFO L85 PathProgramCache]: Analyzing trace with hash 966313014, now seen corresponding path program 10 times [2022-01-31 18:26:01,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:01,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618375939] [2022-01-31 18:26:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:01,750 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:01,750 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:01,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:01,751 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:01,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:01,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 18:26:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:01,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 18:26:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:01,869 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 18:26:01,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:01,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618375939] [2022-01-31 18:26:01,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [618375939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:01,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:01,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:26:01,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012392880] [2022-01-31 18:26:01,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:01,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:26:01,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:26:01,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:26:01,871 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:02,382 INFO L93 Difference]: Finished difference Result 241 states and 295 transitions. [2022-01-31 18:26:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 18:26:02,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-01-31 18:26:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:02,384 INFO L225 Difference]: With dead ends: 241 [2022-01-31 18:26:02,384 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 18:26:02,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:26:02,385 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 398 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:02,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 37 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:26:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 18:26:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 83. [2022-01-31 18:26:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 72 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-01-31 18:26:02,402 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 59 [2022-01-31 18:26:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:02,403 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-01-31 18:26:02,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-01-31 18:26:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 18:26:02,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:02,405 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:02,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:26:02,405 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1028948788, now seen corresponding path program 11 times [2022-01-31 18:26:02,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:02,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505245956] [2022-01-31 18:26:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:02,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:02,411 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:02,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:02,412 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:02,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:02,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 18:26:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:02,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:26:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:02,570 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 18:26:02,570 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:02,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505245956] [2022-01-31 18:26:02,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [505245956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:02,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:02,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 18:26:02,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595013388] [2022-01-31 18:26:02,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:02,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 18:26:02,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 18:26:02,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:26:02,571 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:03,119 INFO L93 Difference]: Finished difference Result 253 states and 310 transitions. [2022-01-31 18:26:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:26:03,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2022-01-31 18:26:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:03,120 INFO L225 Difference]: With dead ends: 253 [2022-01-31 18:26:03,120 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 18:26:03,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:26:03,121 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 479 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:03,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 35 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:26:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 18:26:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 85. [2022-01-31 18:26:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2022-01-31 18:26:03,133 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 61 [2022-01-31 18:26:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:03,133 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2022-01-31 18:26:03,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2022-01-31 18:26:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 18:26:03,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:03,134 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:03,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:26:03,134 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:03,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1092385458, now seen corresponding path program 12 times [2022-01-31 18:26:03,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:03,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102849303] [2022-01-31 18:26:03,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:03,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:03,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:03,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:03,137 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:03,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:03,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 18:26:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:03,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 18:26:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:03,298 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 18:26:03,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:03,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102849303] [2022-01-31 18:26:03,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2102849303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:03,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:03,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:26:03,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463898938] [2022-01-31 18:26:03,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:03,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:26:03,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:26:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:26:03,300 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:03,898 INFO L93 Difference]: Finished difference Result 265 states and 325 transitions. [2022-01-31 18:26:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:26:03,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-01-31 18:26:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:03,900 INFO L225 Difference]: With dead ends: 265 [2022-01-31 18:26:03,900 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 18:26:03,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=401, Invalid=859, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:26:03,901 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 502 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:03,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 36 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:26:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 18:26:03,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 87. [2022-01-31 18:26:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 74 states have (on average 1.162162162162162) internal successors, (86), 76 states have internal predecessors, (86), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2022-01-31 18:26:03,915 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 63 [2022-01-31 18:26:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:03,915 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2022-01-31 18:26:03,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2022-01-31 18:26:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 18:26:03,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:03,915 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:03,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:26:03,916 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:03,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:03,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1925483184, now seen corresponding path program 13 times [2022-01-31 18:26:03,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:03,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216461744] [2022-01-31 18:26:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:03,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:03,917 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:03,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:03,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:04,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:04,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 18:26:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:04,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 18:26:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:04,065 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 18:26:04,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:04,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216461744] [2022-01-31 18:26:04,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216461744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:04,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:04,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:26:04,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239520684] [2022-01-31 18:26:04,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:04,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:26:04,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:26:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:26:04,067 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:04,738 INFO L93 Difference]: Finished difference Result 277 states and 340 transitions. [2022-01-31 18:26:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:26:04,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-01-31 18:26:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:04,739 INFO L225 Difference]: With dead ends: 277 [2022-01-31 18:26:04,739 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 18:26:04,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=450, Invalid=956, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:26:04,740 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 479 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:04,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 38 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:26:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 18:26:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 89. [2022-01-31 18:26:04,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 78 states have internal predecessors, (88), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2022-01-31 18:26:04,755 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 65 [2022-01-31 18:26:04,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:04,755 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2022-01-31 18:26:04,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2022-01-31 18:26:04,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 18:26:04,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:04,756 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:04,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:26:04,756 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash -626486482, now seen corresponding path program 14 times [2022-01-31 18:26:04,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:04,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347008715] [2022-01-31 18:26:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:04,758 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:04,758 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:04,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:04,759 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:04,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:04,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 18:26:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:04,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 18:26:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:04,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:04,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347008715] [2022-01-31 18:26:04,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [347008715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:04,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:04,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:26:04,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206285611] [2022-01-31 18:26:04,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:04,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:26:04,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:04,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:26:04,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:26:04,942 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:05,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:05,656 INFO L93 Difference]: Finished difference Result 289 states and 355 transitions. [2022-01-31 18:26:05,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:26:05,657 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-01-31 18:26:05,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:05,658 INFO L225 Difference]: With dead ends: 289 [2022-01-31 18:26:05,658 INFO L226 Difference]: Without dead ends: 235 [2022-01-31 18:26:05,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=502, Invalid=1058, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:26:05,661 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 531 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:05,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 37 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:26:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-31 18:26:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 91. [2022-01-31 18:26:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 80 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-01-31 18:26:05,677 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 67 [2022-01-31 18:26:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:05,677 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-01-31 18:26:05,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-01-31 18:26:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 18:26:05,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:05,678 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:05,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:26:05,678 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:05,679 INFO L85 PathProgramCache]: Analyzing trace with hash -643009492, now seen corresponding path program 15 times [2022-01-31 18:26:05,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:05,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864664299] [2022-01-31 18:26:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:05,680 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:05,680 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:05,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:05,681 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:05,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:05,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 18:26:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:05,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 18:26:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:05,862 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:05,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864664299] [2022-01-31 18:26:05,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [864664299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:05,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:05,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 18:26:05,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303669044] [2022-01-31 18:26:05,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:05,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 18:26:05,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 18:26:05,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:26:05,864 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:06,616 INFO L93 Difference]: Finished difference Result 301 states and 370 transitions. [2022-01-31 18:26:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 18:26:06,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2022-01-31 18:26:06,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:06,618 INFO L225 Difference]: With dead ends: 301 [2022-01-31 18:26:06,618 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 18:26:06,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=557, Invalid=1165, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:26:06,619 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 572 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:06,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 36 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:26:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 18:26:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 93. [2022-01-31 18:26:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 80 states have (on average 1.15) internal successors, (92), 82 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2022-01-31 18:26:06,636 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 69 [2022-01-31 18:26:06,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:06,637 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2022-01-31 18:26:06,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2022-01-31 18:26:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 18:26:06,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:06,637 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:06,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:26:06,637 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:06,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:06,638 INFO L85 PathProgramCache]: Analyzing trace with hash 658247082, now seen corresponding path program 16 times [2022-01-31 18:26:06,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:06,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064686819] [2022-01-31 18:26:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:06,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:06,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:06,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:06,640 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:06,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:06,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 18:26:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:06,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 18:26:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:06,827 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 18:26:06,827 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:06,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064686819] [2022-01-31 18:26:06,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064686819] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:06,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:06,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:26:06,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894733099] [2022-01-31 18:26:06,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:06,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:26:06,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:06,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:26:06,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:26:06,829 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:07,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:07,674 INFO L93 Difference]: Finished difference Result 313 states and 385 transitions. [2022-01-31 18:26:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:26:07,674 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2022-01-31 18:26:07,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:07,676 INFO L225 Difference]: With dead ends: 313 [2022-01-31 18:26:07,676 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 18:26:07,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=615, Invalid=1277, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:26:07,677 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 621 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:07,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 38 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:26:07,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 18:26:07,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 95. [2022-01-31 18:26:07,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 82 states have (on average 1.146341463414634) internal successors, (94), 84 states have internal predecessors, (94), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2022-01-31 18:26:07,695 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 71 [2022-01-31 18:26:07,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:07,695 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2022-01-31 18:26:07,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:07,695 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2022-01-31 18:26:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 18:26:07,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:07,696 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:07,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:26:07,696 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1330331560, now seen corresponding path program 17 times [2022-01-31 18:26:07,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:07,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413026422] [2022-01-31 18:26:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:07,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:07,698 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:07,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:07,699 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:07,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:07,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 18:26:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:07,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 18:26:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:07,911 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 18:26:07,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:07,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413026422] [2022-01-31 18:26:07,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1413026422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:07,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:07,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 18:26:07,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915884432] [2022-01-31 18:26:07,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:07,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 18:26:07,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:07,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 18:26:07,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:26:07,912 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:08,799 INFO L93 Difference]: Finished difference Result 325 states and 400 transitions. [2022-01-31 18:26:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:26:08,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2022-01-31 18:26:08,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:08,800 INFO L225 Difference]: With dead ends: 325 [2022-01-31 18:26:08,800 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 18:26:08,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=1394, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:26:08,801 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 697 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:08,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 36 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:26:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 18:26:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 97. [2022-01-31 18:26:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 86 states have internal predecessors, (96), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2022-01-31 18:26:08,821 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 73 [2022-01-31 18:26:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:08,821 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2022-01-31 18:26:08,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2022-01-31 18:26:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 18:26:08,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:08,822 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:08,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:26:08,822 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1336546778, now seen corresponding path program 18 times [2022-01-31 18:26:08,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:08,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254957034] [2022-01-31 18:26:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:08,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:08,824 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:08,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:08,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:09,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:09,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 18:26:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:09,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 18:26:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:09,055 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 18:26:09,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:09,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254957034] [2022-01-31 18:26:09,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [254957034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:09,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:09,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:26:09,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018038859] [2022-01-31 18:26:09,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:09,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:26:09,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:09,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:26:09,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:26:09,057 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:09,998 INFO L93 Difference]: Finished difference Result 337 states and 415 transitions. [2022-01-31 18:26:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 18:26:09,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2022-01-31 18:26:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:09,999 INFO L225 Difference]: With dead ends: 337 [2022-01-31 18:26:09,999 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 18:26:10,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1516, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:26:10,000 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 653 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:10,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 37 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:26:10,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 18:26:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 99. [2022-01-31 18:26:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 88 states have internal predecessors, (98), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2022-01-31 18:26:10,022 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 75 [2022-01-31 18:26:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:10,022 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2022-01-31 18:26:10,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2022-01-31 18:26:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 18:26:10,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:10,023 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:10,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:26:10,023 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash -111153884, now seen corresponding path program 19 times [2022-01-31 18:26:10,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:10,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298511213] [2022-01-31 18:26:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:10,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:10,025 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:10,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:10,027 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:10,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:10,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 18:26:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:10,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 18:26:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:10,267 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 18:26:10,267 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:10,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298511213] [2022-01-31 18:26:10,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1298511213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:10,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:10,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 18:26:10,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981780643] [2022-01-31 18:26:10,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:10,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 18:26:10,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 18:26:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:26:10,269 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:11,313 INFO L93 Difference]: Finished difference Result 349 states and 430 transitions. [2022-01-31 18:26:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 18:26:11,314 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-01-31 18:26:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:11,315 INFO L225 Difference]: With dead ends: 349 [2022-01-31 18:26:11,315 INFO L226 Difference]: Without dead ends: 295 [2022-01-31 18:26:11,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=807, Invalid=1643, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:26:11,316 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 677 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:11,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 37 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:26:11,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-31 18:26:11,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 101. [2022-01-31 18:26:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 90 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2022-01-31 18:26:11,339 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 77 [2022-01-31 18:26:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:11,339 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2022-01-31 18:26:11,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2022-01-31 18:26:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 18:26:11,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:11,340 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:11,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:26:11,340 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:11,340 INFO L85 PathProgramCache]: Analyzing trace with hash 670378146, now seen corresponding path program 20 times [2022-01-31 18:26:11,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:11,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465068765] [2022-01-31 18:26:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:11,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:11,342 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:11,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:11,343 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:11,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:11,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 18:26:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:11,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 18:26:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:11,608 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 18:26:11,608 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:11,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465068765] [2022-01-31 18:26:11,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [465068765] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:11,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:11,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 18:26:11,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404762156] [2022-01-31 18:26:11,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:11,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 18:26:11,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 18:26:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:26:11,611 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 24 states have internal predecessors, (71), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:12,697 INFO L93 Difference]: Finished difference Result 361 states and 445 transitions. [2022-01-31 18:26:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:26:12,697 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 24 states have internal predecessors, (71), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 79 [2022-01-31 18:26:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:12,698 INFO L225 Difference]: With dead ends: 361 [2022-01-31 18:26:12,698 INFO L226 Difference]: Without dead ends: 307 [2022-01-31 18:26:12,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=877, Invalid=1775, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:26:12,699 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 771 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:12,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 37 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:26:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-31 18:26:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 103. [2022-01-31 18:26:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 92 states have internal predecessors, (102), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2022-01-31 18:26:12,724 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 79 [2022-01-31 18:26:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:12,725 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2022-01-31 18:26:12,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 24 states have internal predecessors, (71), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2022-01-31 18:26:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 18:26:12,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:12,725 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:12,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:26:12,726 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:12,726 INFO L85 PathProgramCache]: Analyzing trace with hash 103382176, now seen corresponding path program 21 times [2022-01-31 18:26:12,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:12,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018872278] [2022-01-31 18:26:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:12,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:12,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:12,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:12,729 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:12,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:13,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 18:26:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:13,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 18:26:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:13,023 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 18:26:13,023 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:13,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018872278] [2022-01-31 18:26:13,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1018872278] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:13,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:13,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:26:13,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634290931] [2022-01-31 18:26:13,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:13,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:26:13,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:26:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:26:13,025 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 25 states have internal predecessors, (73), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:14,188 INFO L93 Difference]: Finished difference Result 373 states and 460 transitions. [2022-01-31 18:26:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 18:26:14,188 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 25 states have internal predecessors, (73), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2022-01-31 18:26:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:14,190 INFO L225 Difference]: With dead ends: 373 [2022-01-31 18:26:14,190 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 18:26:14,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=950, Invalid=1912, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:26:14,191 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 746 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:14,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 38 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:26:14,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 18:26:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 105. [2022-01-31 18:26:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 94 states have internal predecessors, (104), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2022-01-31 18:26:14,220 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 81 [2022-01-31 18:26:14,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:14,220 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2022-01-31 18:26:14,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 25 states have internal predecessors, (73), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2022-01-31 18:26:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 18:26:14,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:14,221 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:14,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:26:14,221 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:14,221 INFO L85 PathProgramCache]: Analyzing trace with hash 681101598, now seen corresponding path program 22 times [2022-01-31 18:26:14,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:14,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039751614] [2022-01-31 18:26:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:14,223 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:14,223 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:14,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:14,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:14,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:14,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 18:26:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:14,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 18:26:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:14,525 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 18:26:14,526 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:14,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039751614] [2022-01-31 18:26:14,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039751614] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:14,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:14,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 18:26:14,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60592531] [2022-01-31 18:26:14,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:14,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 18:26:14,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:14,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 18:26:14,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:26:14,527 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 26 states have internal predecessors, (75), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:15,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:15,804 INFO L93 Difference]: Finished difference Result 385 states and 475 transitions. [2022-01-31 18:26:15,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:26:15,804 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 26 states have internal predecessors, (75), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 83 [2022-01-31 18:26:15,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:15,805 INFO L225 Difference]: With dead ends: 385 [2022-01-31 18:26:15,805 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 18:26:15,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1026, Invalid=2054, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:26:15,806 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 948 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:15,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 35 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:26:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 18:26:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 107. [2022-01-31 18:26:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 94 states have (on average 1.127659574468085) internal successors, (106), 96 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2022-01-31 18:26:15,836 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 83 [2022-01-31 18:26:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:15,837 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2022-01-31 18:26:15,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 26 states have internal predecessors, (75), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2022-01-31 18:26:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 18:26:15,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:15,837 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:15,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:26:15,837 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:15,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:15,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1818684956, now seen corresponding path program 23 times [2022-01-31 18:26:15,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:15,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150853179] [2022-01-31 18:26:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:15,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:15,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:15,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:15,841 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:16,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:16,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 18:26:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:16,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 18:26:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:16,169 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 18:26:16,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:16,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150853179] [2022-01-31 18:26:16,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [150853179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:16,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:16,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:26:16,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593568299] [2022-01-31 18:26:16,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:16,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:26:16,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:16,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:26:16,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:26:16,171 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 27 states have internal predecessors, (77), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:17,514 INFO L93 Difference]: Finished difference Result 397 states and 490 transitions. [2022-01-31 18:26:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 18:26:17,514 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 27 states have internal predecessors, (77), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2022-01-31 18:26:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:17,516 INFO L225 Difference]: With dead ends: 397 [2022-01-31 18:26:17,516 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 18:26:17,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1105, Invalid=2201, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:26:17,517 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 938 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:17,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 37 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:26:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 18:26:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 109. [2022-01-31 18:26:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 96 states have (on average 1.125) internal successors, (108), 98 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2022-01-31 18:26:17,549 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 85 [2022-01-31 18:26:17,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:17,550 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2022-01-31 18:26:17,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 27 states have internal predecessors, (77), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2022-01-31 18:26:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 18:26:17,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:17,550 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:17,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:26:17,551 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:17,551 INFO L85 PathProgramCache]: Analyzing trace with hash -180368486, now seen corresponding path program 24 times [2022-01-31 18:26:17,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:17,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100947713] [2022-01-31 18:26:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:17,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:17,552 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:17,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:17,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:17,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:17,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 18:26:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:17,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 18:26:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:17,878 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 18:26:17,878 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:17,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100947713] [2022-01-31 18:26:17,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1100947713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:17,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:17,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 18:26:17,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937793687] [2022-01-31 18:26:17,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:17,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 18:26:17,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:17,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 18:26:17,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:26:17,879 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 28 states have internal predecessors, (79), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:19,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:19,335 INFO L93 Difference]: Finished difference Result 409 states and 505 transitions. [2022-01-31 18:26:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:26:19,335 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 28 states have internal predecessors, (79), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2022-01-31 18:26:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:19,336 INFO L225 Difference]: With dead ends: 409 [2022-01-31 18:26:19,336 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 18:26:19,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1187, Invalid=2353, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:26:19,337 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 954 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:19,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 37 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:26:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 18:26:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 111. [2022-01-31 18:26:19,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 100 states have internal predecessors, (110), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-01-31 18:26:19,371 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 87 [2022-01-31 18:26:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:19,371 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-01-31 18:26:19,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 28 states have internal predecessors, (79), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-01-31 18:26:19,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 18:26:19,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:19,372 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:19,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:26:19,372 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:19,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1420344936, now seen corresponding path program 25 times [2022-01-31 18:26:19,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:19,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711481527] [2022-01-31 18:26:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:19,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:19,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:19,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:19,376 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:19,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:19,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 18:26:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:19,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 18:26:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:19,718 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711481527] [2022-01-31 18:26:19,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1711481527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:19,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:19,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 18:26:19,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845461264] [2022-01-31 18:26:19,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:19,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 18:26:19,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:19,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 18:26:19,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:26:19,720 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 29 states have internal predecessors, (81), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:21,257 INFO L93 Difference]: Finished difference Result 421 states and 520 transitions. [2022-01-31 18:26:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:26:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 29 states have internal predecessors, (81), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2022-01-31 18:26:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:21,259 INFO L225 Difference]: With dead ends: 421 [2022-01-31 18:26:21,259 INFO L226 Difference]: Without dead ends: 367 [2022-01-31 18:26:21,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1272, Invalid=2510, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:26:21,260 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1020 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:21,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1020 Valid, 36 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:26:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-31 18:26:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 113. [2022-01-31 18:26:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 100 states have (on average 1.12) internal successors, (112), 102 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2022-01-31 18:26:21,297 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 89 [2022-01-31 18:26:21,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:21,297 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2022-01-31 18:26:21,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 29 states have internal predecessors, (81), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2022-01-31 18:26:21,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 18:26:21,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:21,298 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:21,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:26:21,298 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:21,298 INFO L85 PathProgramCache]: Analyzing trace with hash 963194902, now seen corresponding path program 26 times [2022-01-31 18:26:21,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:21,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757466034] [2022-01-31 18:26:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:21,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:21,300 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:21,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:21,302 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:21,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:21,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 18:26:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:21,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 18:26:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:21,648 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 18:26:21,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:21,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757466034] [2022-01-31 18:26:21,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [757466034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:21,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:21,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:26:21,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050540456] [2022-01-31 18:26:21,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:21,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:26:21,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:21,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:26:21,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=579, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:26:21,650 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 30 states have internal predecessors, (83), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:23,308 INFO L93 Difference]: Finished difference Result 433 states and 535 transitions. [2022-01-31 18:26:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 18:26:23,308 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 30 states have internal predecessors, (83), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2022-01-31 18:26:23,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:23,310 INFO L225 Difference]: With dead ends: 433 [2022-01-31 18:26:23,310 INFO L226 Difference]: Without dead ends: 379 [2022-01-31 18:26:23,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1360, Invalid=2672, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:26:23,311 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1065 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:23,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1065 Valid, 36 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:26:23,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-31 18:26:23,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 115. [2022-01-31 18:26:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 104 states have internal predecessors, (114), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2022-01-31 18:26:23,349 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2022-01-31 18:26:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:23,350 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2022-01-31 18:26:23,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 30 states have internal predecessors, (83), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2022-01-31 18:26:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 18:26:23,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:23,350 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:23,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:26:23,350 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1967556844, now seen corresponding path program 27 times [2022-01-31 18:26:23,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:23,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069379846] [2022-01-31 18:26:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:23,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:23,352 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:23,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:23,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:23,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:23,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 18:26:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:23,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:26:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:23,755 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 18:26:23,755 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069379846] [2022-01-31 18:26:23,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2069379846] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:23,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:23,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 18:26:23,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36118682] [2022-01-31 18:26:23,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:23,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 18:26:23,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:23,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 18:26:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=614, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:26:23,756 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 31 states have internal predecessors, (85), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:25,572 INFO L93 Difference]: Finished difference Result 445 states and 550 transitions. [2022-01-31 18:26:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 18:26:25,572 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 31 states have internal predecessors, (85), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 93 [2022-01-31 18:26:25,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:25,573 INFO L225 Difference]: With dead ends: 445 [2022-01-31 18:26:25,573 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 18:26:25,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1451, Invalid=2839, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:26:25,575 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1118 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:25,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 37 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:26:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 18:26:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 117. [2022-01-31 18:26:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 106 states have internal predecessors, (116), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2022-01-31 18:26:25,621 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 93 [2022-01-31 18:26:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:25,621 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2022-01-31 18:26:25,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 31 states have internal predecessors, (85), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2022-01-31 18:26:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:26:25,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:25,622 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:25,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:26:25,622 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:25,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:25,622 INFO L85 PathProgramCache]: Analyzing trace with hash -921438574, now seen corresponding path program 28 times [2022-01-31 18:26:25,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:25,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753562998] [2022-01-31 18:26:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:25,624 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:25,624 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:25,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:25,626 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:25,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:26,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 18:26:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:26,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 18:26:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:26,029 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 18:26:26,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:26,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753562998] [2022-01-31 18:26:26,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753562998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:26,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:26,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 18:26:26,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872455958] [2022-01-31 18:26:26,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:26,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 18:26:26,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:26,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 18:26:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=650, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:26:26,032 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 32 states have internal predecessors, (87), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:27,950 INFO L93 Difference]: Finished difference Result 457 states and 565 transitions. [2022-01-31 18:26:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 18:26:27,951 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 32 states have internal predecessors, (87), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 95 [2022-01-31 18:26:27,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:27,952 INFO L225 Difference]: With dead ends: 457 [2022-01-31 18:26:27,952 INFO L226 Difference]: Without dead ends: 403 [2022-01-31 18:26:27,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1545, Invalid=3011, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:26:27,953 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1081 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:27,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1081 Valid, 37 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:26:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-31 18:26:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 119. [2022-01-31 18:26:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 108 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2022-01-31 18:26:27,997 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 95 [2022-01-31 18:26:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:27,998 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2022-01-31 18:26:27,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 32 states have internal predecessors, (87), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2022-01-31 18:26:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 18:26:27,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:27,998 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:27,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:26:27,999 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:27,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash -624128368, now seen corresponding path program 29 times [2022-01-31 18:26:27,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:27,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102426099] [2022-01-31 18:26:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:28,000 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:28,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:28,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:28,003 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:28,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 18:26:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:28,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 18:26:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:28,444 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 18:26:28,444 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:28,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102426099] [2022-01-31 18:26:28,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [102426099] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:28,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:28,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 18:26:28,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703115527] [2022-01-31 18:26:28,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:28,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 18:26:28,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 18:26:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=687, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:26:28,445 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 33 states have internal predecessors, (89), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:30,543 INFO L93 Difference]: Finished difference Result 469 states and 580 transitions. [2022-01-31 18:26:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 18:26:30,544 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 33 states have internal predecessors, (89), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 97 [2022-01-31 18:26:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:30,545 INFO L225 Difference]: With dead ends: 469 [2022-01-31 18:26:30,545 INFO L226 Difference]: Without dead ends: 415 [2022-01-31 18:26:30,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1642, Invalid=3188, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:26:30,546 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1069 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:30,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 37 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:26:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-31 18:26:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 121. [2022-01-31 18:26:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 110 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2022-01-31 18:26:30,598 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 97 [2022-01-31 18:26:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:30,599 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2022-01-31 18:26:30,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 33 states have internal predecessors, (89), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2022-01-31 18:26:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 18:26:30,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:30,599 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:30,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 18:26:30,600 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1623138062, now seen corresponding path program 30 times [2022-01-31 18:26:30,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:30,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928460295] [2022-01-31 18:26:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:30,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:30,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:30,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:30,604 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:31,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:31,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 18:26:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:31,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 18:26:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:31,043 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 18:26:31,043 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928460295] [2022-01-31 18:26:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [928460295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:31,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:31,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 18:26:31,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105543957] [2022-01-31 18:26:31,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:31,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 18:26:31,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 18:26:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=725, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:26:31,044 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 34 states have internal predecessors, (91), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:33,314 INFO L93 Difference]: Finished difference Result 481 states and 595 transitions. [2022-01-31 18:26:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:26:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 34 states have internal predecessors, (91), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2022-01-31 18:26:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:33,316 INFO L225 Difference]: With dead ends: 481 [2022-01-31 18:26:33,316 INFO L226 Difference]: Without dead ends: 427 [2022-01-31 18:26:33,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1742, Invalid=3370, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:26:33,317 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1235 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:33,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 37 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:26:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-31 18:26:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 123. [2022-01-31 18:26:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 110 states have (on average 1.1090909090909091) internal successors, (122), 112 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2022-01-31 18:26:33,370 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 99 [2022-01-31 18:26:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:33,370 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2022-01-31 18:26:33,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 34 states have internal predecessors, (91), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2022-01-31 18:26:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 18:26:33,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:33,371 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:33,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 18:26:33,371 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:33,371 INFO L85 PathProgramCache]: Analyzing trace with hash 877627404, now seen corresponding path program 31 times [2022-01-31 18:26:33,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:33,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550285974] [2022-01-31 18:26:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:33,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:33,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:33,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:33,375 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:33,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:33,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 18:26:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:33,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 18:26:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:33,876 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 18:26:33,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:33,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550285974] [2022-01-31 18:26:33,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550285974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:33,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:33,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 18:26:33,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572340000] [2022-01-31 18:26:33,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:33,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 18:26:33,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:33,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 18:26:33,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=764, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:26:33,879 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 35 states have internal predecessors, (93), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:36,286 INFO L93 Difference]: Finished difference Result 493 states and 610 transitions. [2022-01-31 18:26:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 18:26:36,286 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 35 states have internal predecessors, (93), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 101 [2022-01-31 18:26:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:36,287 INFO L225 Difference]: With dead ends: 493 [2022-01-31 18:26:36,287 INFO L226 Difference]: Without dead ends: 439 [2022-01-31 18:26:36,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1845, Invalid=3557, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:26:36,288 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1121 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:36,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 40 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:26:36,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-31 18:26:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 125. [2022-01-31 18:26:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 112 states have (on average 1.1071428571428572) internal successors, (124), 114 states have internal predecessors, (124), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2022-01-31 18:26:36,341 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2022-01-31 18:26:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:36,342 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2022-01-31 18:26:36,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 35 states have internal predecessors, (93), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2022-01-31 18:26:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 18:26:36,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:36,342 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:36,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 18:26:36,342 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:36,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1701423498, now seen corresponding path program 32 times [2022-01-31 18:26:36,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:36,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883474027] [2022-01-31 18:26:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:36,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:36,344 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:36,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:36,347 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:36,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:36,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 18:26:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:36,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 18:26:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:36,817 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 18:26:36,817 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:36,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883474027] [2022-01-31 18:26:36,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [883474027] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:36,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:36,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 18:26:36,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393615624] [2022-01-31 18:26:36,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:36,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 18:26:36,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:36,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 18:26:36,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=804, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:26:36,824 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 38 states, 38 states have (on average 2.5) internal successors, (95), 36 states have internal predecessors, (95), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:39,372 INFO L93 Difference]: Finished difference Result 505 states and 625 transitions. [2022-01-31 18:26:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 18:26:39,373 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 36 states have internal predecessors, (95), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2022-01-31 18:26:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:39,374 INFO L225 Difference]: With dead ends: 505 [2022-01-31 18:26:39,374 INFO L226 Difference]: Without dead ends: 451 [2022-01-31 18:26:39,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1951, Invalid=3749, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:26:39,375 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1216 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:39,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 38 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:26:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-31 18:26:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 127. [2022-01-31 18:26:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 114 states have (on average 1.105263157894737) internal successors, (126), 116 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2022-01-31 18:26:39,430 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 103 [2022-01-31 18:26:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:39,431 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2022-01-31 18:26:39,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 36 states have internal predecessors, (95), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2022-01-31 18:26:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 18:26:39,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:39,431 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:39,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 18:26:39,431 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1199479928, now seen corresponding path program 33 times [2022-01-31 18:26:39,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:39,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226855001] [2022-01-31 18:26:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:39,433 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:39,433 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:39,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:39,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:39,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:39,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 18:26:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:39,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-31 18:26:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:39,970 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 18:26:39,970 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226855001] [2022-01-31 18:26:39,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [226855001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:39,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:39,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 18:26:39,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734489092] [2022-01-31 18:26:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:39,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 18:26:39,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 18:26:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=845, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:26:39,972 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:42,710 INFO L93 Difference]: Finished difference Result 517 states and 640 transitions. [2022-01-31 18:26:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 18:26:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2022-01-31 18:26:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:42,712 INFO L225 Difference]: With dead ends: 517 [2022-01-31 18:26:42,712 INFO L226 Difference]: Without dead ends: 463 [2022-01-31 18:26:42,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2060, Invalid=3946, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:26:42,712 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1283 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:42,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1283 Valid, 39 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:26:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-31 18:26:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 129. [2022-01-31 18:26:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 116 states have (on average 1.103448275862069) internal successors, (128), 118 states have internal predecessors, (128), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 141 transitions. [2022-01-31 18:26:42,772 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 141 transitions. Word has length 105 [2022-01-31 18:26:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:42,772 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 141 transitions. [2022-01-31 18:26:42,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 141 transitions. [2022-01-31 18:26:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 18:26:42,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:42,773 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:42,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 18:26:42,773 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1533897210, now seen corresponding path program 34 times [2022-01-31 18:26:42,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:42,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111656664] [2022-01-31 18:26:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:42,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:42,775 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:42,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:42,778 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:43,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:43,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 18:26:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:43,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 18:26:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:43,305 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 18:26:43,305 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:43,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111656664] [2022-01-31 18:26:43,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111656664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:43,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:43,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 18:26:43,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743569130] [2022-01-31 18:26:43,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:43,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 18:26:43,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 18:26:43,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=887, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:26:43,307 INFO L87 Difference]: Start difference. First operand 129 states and 141 transitions. Second operand has 40 states, 40 states have (on average 2.475) internal successors, (99), 38 states have internal predecessors, (99), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:46,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:46,239 INFO L93 Difference]: Finished difference Result 529 states and 655 transitions. [2022-01-31 18:26:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 18:26:46,239 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 38 states have internal predecessors, (99), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 107 [2022-01-31 18:26:46,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:46,241 INFO L225 Difference]: With dead ends: 529 [2022-01-31 18:26:46,241 INFO L226 Difference]: Without dead ends: 475 [2022-01-31 18:26:46,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2172, Invalid=4148, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:26:46,243 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1471 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:46,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 34 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:26:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-31 18:26:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 131. [2022-01-31 18:26:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 118 states have (on average 1.1016949152542372) internal successors, (130), 120 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2022-01-31 18:26:46,305 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 107 [2022-01-31 18:26:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:46,305 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2022-01-31 18:26:46,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 38 states have internal predecessors, (99), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2022-01-31 18:26:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 18:26:46,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:46,306 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:46,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 18:26:46,306 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:46,307 INFO L85 PathProgramCache]: Analyzing trace with hash -786358012, now seen corresponding path program 35 times [2022-01-31 18:26:46,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:46,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84111398] [2022-01-31 18:26:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:46,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:46,308 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:46,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:46,311 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:46,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 18:26:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:46,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 18:26:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:46,852 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 18:26:46,852 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:46,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84111398] [2022-01-31 18:26:46,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [84111398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:46,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:46,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 18:26:46,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996491095] [2022-01-31 18:26:46,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:46,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 18:26:46,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 18:26:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=930, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:26:46,854 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 39 states have internal predecessors, (101), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:49,895 INFO L93 Difference]: Finished difference Result 541 states and 670 transitions. [2022-01-31 18:26:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 18:26:49,896 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 39 states have internal predecessors, (101), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2022-01-31 18:26:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:49,897 INFO L225 Difference]: With dead ends: 541 [2022-01-31 18:26:49,897 INFO L226 Difference]: Without dead ends: 487 [2022-01-31 18:26:49,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2287, Invalid=4355, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:26:49,899 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1295 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:49,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1295 Valid, 37 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:26:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-01-31 18:26:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 133. [2022-01-31 18:26:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 120 states have (on average 1.1) internal successors, (132), 122 states have internal predecessors, (132), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2022-01-31 18:26:49,964 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 109 [2022-01-31 18:26:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:49,965 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2022-01-31 18:26:49,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 39 states have internal predecessors, (101), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2022-01-31 18:26:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 18:26:49,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:49,965 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:49,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 18:26:49,965 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:49,966 INFO L85 PathProgramCache]: Analyzing trace with hash 339272834, now seen corresponding path program 36 times [2022-01-31 18:26:49,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:49,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346381193] [2022-01-31 18:26:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:49,967 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:49,968 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:49,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:49,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:50,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:50,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 18:26:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:50,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 18:26:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:50,533 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 18:26:50,534 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:50,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346381193] [2022-01-31 18:26:50,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [346381193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:50,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:50,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 18:26:50,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127710252] [2022-01-31 18:26:50,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:50,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 18:26:50,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:50,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 18:26:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=974, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:26:50,535 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 42 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 40 states have internal predecessors, (103), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:53,788 INFO L93 Difference]: Finished difference Result 553 states and 685 transitions. [2022-01-31 18:26:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 18:26:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 40 states have internal predecessors, (103), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2022-01-31 18:26:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:53,790 INFO L225 Difference]: With dead ends: 553 [2022-01-31 18:26:53,790 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 18:26:53,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2405, Invalid=4567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:26:53,791 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1414 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 787 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 787 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:53,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 39 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [787 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:26:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 18:26:53,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 135. [2022-01-31 18:26:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 122 states have (on average 1.098360655737705) internal successors, (134), 124 states have internal predecessors, (134), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2022-01-31 18:26:53,860 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 111 [2022-01-31 18:26:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:53,860 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2022-01-31 18:26:53,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 40 states have internal predecessors, (103), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2022-01-31 18:26:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 18:26:53,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:53,861 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:53,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 18:26:53,861 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:53,861 INFO L85 PathProgramCache]: Analyzing trace with hash -261242752, now seen corresponding path program 37 times [2022-01-31 18:26:53,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:53,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783049074] [2022-01-31 18:26:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:53,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:53,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:53,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:53,866 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:54,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:54,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-31 18:26:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:54,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-01-31 18:26:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:54,444 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 18:26:54,444 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783049074] [2022-01-31 18:26:54,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1783049074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:54,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:54,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 18:26:54,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530417027] [2022-01-31 18:26:54,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:54,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 18:26:54,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:54,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 18:26:54,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=1019, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:26:54,445 INFO L87 Difference]: Start difference. First operand 135 states and 147 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 41 states have internal predecessors, (105), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:57,896 INFO L93 Difference]: Finished difference Result 565 states and 700 transitions. [2022-01-31 18:26:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 18:26:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 41 states have internal predecessors, (105), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 113 [2022-01-31 18:26:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:57,898 INFO L225 Difference]: With dead ends: 565 [2022-01-31 18:26:57,898 INFO L226 Difference]: Without dead ends: 511 [2022-01-31 18:26:57,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2526, Invalid=4784, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:26:57,898 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1377 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:57,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1377 Valid, 40 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:26:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-31 18:26:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 137. [2022-01-31 18:26:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 124 states have (on average 1.096774193548387) internal successors, (136), 126 states have internal predecessors, (136), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:26:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2022-01-31 18:26:57,971 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 113 [2022-01-31 18:26:57,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:57,972 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2022-01-31 18:26:57,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 41 states have internal predecessors, (105), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:26:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2022-01-31 18:26:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 18:26:57,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:57,972 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:57,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 18:26:57,973 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:57,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1831103234, now seen corresponding path program 38 times [2022-01-31 18:26:57,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:57,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558726811] [2022-01-31 18:26:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:57,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:57,975 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:57,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:57,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:58,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:58,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 18:26:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:58,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-31 18:26:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:58,592 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 18:26:58,592 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:58,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558726811] [2022-01-31 18:26:58,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [558726811] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:58,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:58,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 18:26:58,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979334231] [2022-01-31 18:26:58,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:58,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 18:26:58,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:58,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 18:26:58,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=1065, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:26:58,593 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 42 states have internal predecessors, (107), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:02,234 INFO L93 Difference]: Finished difference Result 577 states and 715 transitions. [2022-01-31 18:27:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:27:02,234 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 42 states have internal predecessors, (107), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 115 [2022-01-31 18:27:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:02,236 INFO L225 Difference]: With dead ends: 577 [2022-01-31 18:27:02,236 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 18:27:02,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2650, Invalid=5006, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:27:02,237 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1370 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:02,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 37 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:27:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 18:27:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 139. [2022-01-31 18:27:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 128 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:27:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2022-01-31 18:27:02,320 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 115 [2022-01-31 18:27:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:02,321 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2022-01-31 18:27:02,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 42 states have internal predecessors, (107), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2022-01-31 18:27:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 18:27:02,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:02,321 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:02,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 18:27:02,321 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1361461756, now seen corresponding path program 39 times [2022-01-31 18:27:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:02,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766224692] [2022-01-31 18:27:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:02,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:02,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:02,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:02,327 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:02,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:02,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 18:27:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:02,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-31 18:27:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:02,997 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 18:27:02,997 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:02,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766224692] [2022-01-31 18:27:02,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1766224692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:02,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:02,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 18:27:02,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252760939] [2022-01-31 18:27:02,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:02,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 18:27:02,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:02,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 18:27:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=868, Invalid=1112, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:27:02,999 INFO L87 Difference]: Start difference. First operand 139 states and 151 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:06,930 INFO L93 Difference]: Finished difference Result 589 states and 730 transitions. [2022-01-31 18:27:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 18:27:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 117 [2022-01-31 18:27:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:06,932 INFO L225 Difference]: With dead ends: 589 [2022-01-31 18:27:06,932 INFO L226 Difference]: Without dead ends: 535 [2022-01-31 18:27:06,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2777, Invalid=5233, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:27:06,933 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1618 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:06,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1618 Valid, 37 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [892 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:27:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-31 18:27:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 141. [2022-01-31 18:27:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 128 states have (on average 1.09375) internal successors, (140), 130 states have internal predecessors, (140), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:27:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 153 transitions. [2022-01-31 18:27:07,017 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 153 transitions. Word has length 117 [2022-01-31 18:27:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:07,017 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 153 transitions. [2022-01-31 18:27:07,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 153 transitions. [2022-01-31 18:27:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 18:27:07,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:07,018 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:07,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 18:27:07,018 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1485199494, now seen corresponding path program 40 times [2022-01-31 18:27:07,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:07,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114004279] [2022-01-31 18:27:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:07,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:07,020 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:07,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:07,023 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:07,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:07,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 18:27:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:07,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-31 18:27:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:07,726 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:07,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114004279] [2022-01-31 18:27:07,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114004279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:07,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:07,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 18:27:07,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439639638] [2022-01-31 18:27:07,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:07,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 18:27:07,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 18:27:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=1160, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:27:07,727 INFO L87 Difference]: Start difference. First operand 141 states and 153 transitions. Second operand has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 44 states have internal predecessors, (111), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:11,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:11,784 INFO L93 Difference]: Finished difference Result 601 states and 745 transitions. [2022-01-31 18:27:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 18:27:11,784 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 44 states have internal predecessors, (111), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 119 [2022-01-31 18:27:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:11,786 INFO L225 Difference]: With dead ends: 601 [2022-01-31 18:27:11,786 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 18:27:11,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2907, Invalid=5465, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:27:11,787 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1555 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:11,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1555 Valid, 35 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:27:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 18:27:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 143. [2022-01-31 18:27:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 130 states have (on average 1.0923076923076922) internal successors, (142), 132 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:27:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2022-01-31 18:27:11,869 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 119 [2022-01-31 18:27:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:11,869 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2022-01-31 18:27:11,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 44 states have internal predecessors, (111), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2022-01-31 18:27:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 18:27:11,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:11,870 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:11,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 18:27:11,870 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:11,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1232493192, now seen corresponding path program 41 times [2022-01-31 18:27:11,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:11,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749638360] [2022-01-31 18:27:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:11,872 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:11,872 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:11,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:11,879 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:12,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:12,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-01-31 18:27:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:12,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-01-31 18:27:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:12,557 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 18:27:12,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:12,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749638360] [2022-01-31 18:27:12,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749638360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:12,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:12,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:27:12,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580333933] [2022-01-31 18:27:12,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:12,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:27:12,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:27:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=953, Invalid=1209, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:27:12,559 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 45 states have internal predecessors, (113), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:16,884 INFO L93 Difference]: Finished difference Result 613 states and 760 transitions. [2022-01-31 18:27:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 18:27:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 45 states have internal predecessors, (113), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-01-31 18:27:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:16,886 INFO L225 Difference]: With dead ends: 613 [2022-01-31 18:27:16,886 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 18:27:16,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3040, Invalid=5702, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:27:16,887 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1823 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1823 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:16,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1823 Valid, 35 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:27:16,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 18:27:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 145. [2022-01-31 18:27:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 134 states have internal predecessors, (144), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:27:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2022-01-31 18:27:16,975 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 121 [2022-01-31 18:27:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:16,976 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2022-01-31 18:27:16,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 45 states have internal predecessors, (113), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2022-01-31 18:27:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 18:27:16,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:16,976 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:16,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 18:27:16,976 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1100094454, now seen corresponding path program 42 times [2022-01-31 18:27:16,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:16,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501817908] [2022-01-31 18:27:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:16,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:16,979 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:16,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:16,982 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:17,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:17,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-31 18:27:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:17,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-31 18:27:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:17,714 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 18:27:17,714 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:17,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501817908] [2022-01-31 18:27:17,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [501817908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:17,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:17,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 18:27:17,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016417452] [2022-01-31 18:27:17,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:17,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 18:27:17,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:17,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 18:27:17,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=1259, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:27:17,716 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 46 states have internal predecessors, (115), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:22,299 INFO L93 Difference]: Finished difference Result 625 states and 775 transitions. [2022-01-31 18:27:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 18:27:22,299 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 46 states have internal predecessors, (115), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2022-01-31 18:27:22,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:22,301 INFO L225 Difference]: With dead ends: 625 [2022-01-31 18:27:22,301 INFO L226 Difference]: Without dead ends: 571 [2022-01-31 18:27:22,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3176, Invalid=5944, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:27:22,302 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1943 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 1064 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1943 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1064 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:22,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1943 Valid, 34 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1064 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:27:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-31 18:27:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 147. [2022-01-31 18:27:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 134 states have (on average 1.0895522388059702) internal successors, (146), 136 states have internal predecessors, (146), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:27:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2022-01-31 18:27:22,395 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 123 [2022-01-31 18:27:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:22,395 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2022-01-31 18:27:22,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 46 states have internal predecessors, (115), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2022-01-31 18:27:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 18:27:22,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:22,396 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:22,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 18:27:22,396 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:22,396 INFO L85 PathProgramCache]: Analyzing trace with hash 743893748, now seen corresponding path program 43 times [2022-01-31 18:27:22,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:22,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405848297] [2022-01-31 18:27:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:22,398 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:22,398 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:22,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:22,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:23,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:23,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-31 18:27:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:23,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-31 18:27:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:23,146 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 18:27:23,146 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:23,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405848297] [2022-01-31 18:27:23,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [405848297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:23,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:23,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 18:27:23,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356617590] [2022-01-31 18:27:23,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:23,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 18:27:23,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 18:27:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1042, Invalid=1310, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:27:23,148 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 47 states have internal predecessors, (117), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:28,022 INFO L93 Difference]: Finished difference Result 637 states and 790 transitions. [2022-01-31 18:27:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 18:27:28,023 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 47 states have internal predecessors, (117), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 125 [2022-01-31 18:27:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:28,024 INFO L225 Difference]: With dead ends: 637 [2022-01-31 18:27:28,025 INFO L226 Difference]: Without dead ends: 583 [2022-01-31 18:27:28,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3315, Invalid=6191, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:27:28,026 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1682 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 940 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:28,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 38 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [940 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:27:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-31 18:27:28,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 149. [2022-01-31 18:27:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 136 states have (on average 1.088235294117647) internal successors, (148), 138 states have internal predecessors, (148), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:27:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2022-01-31 18:27:28,123 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 125 [2022-01-31 18:27:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:28,123 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2022-01-31 18:27:28,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 47 states have internal predecessors, (117), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2022-01-31 18:27:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 18:27:28,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:28,124 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:28,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 18:27:28,124 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:28,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2032398962, now seen corresponding path program 44 times [2022-01-31 18:27:28,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:28,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806539112] [2022-01-31 18:27:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:28,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:28,127 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:28,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:28,130 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:28,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:28,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-31 18:27:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:28,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-31 18:27:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:28,911 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 18:27:28,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:28,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806539112] [2022-01-31 18:27:28,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [806539112] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:28,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:28,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 18:27:28,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529617157] [2022-01-31 18:27:28,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:28,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 18:27:28,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 18:27:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=1362, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:27:28,913 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 48 states have internal predecessors, (119), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:34,140 INFO L93 Difference]: Finished difference Result 649 states and 805 transitions. [2022-01-31 18:27:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 18:27:34,140 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 48 states have internal predecessors, (119), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 127 [2022-01-31 18:27:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:34,142 INFO L225 Difference]: With dead ends: 649 [2022-01-31 18:27:34,142 INFO L226 Difference]: Without dead ends: 595 [2022-01-31 18:27:34,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3457, Invalid=6443, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:27:34,143 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2199 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2199 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:34,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2199 Valid, 37 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1208 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:27:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-31 18:27:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 151. [2022-01-31 18:27:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 138 states have (on average 1.0869565217391304) internal successors, (150), 140 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:27:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2022-01-31 18:27:34,244 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 127 [2022-01-31 18:27:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:34,244 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2022-01-31 18:27:34,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 48 states have internal predecessors, (119), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2022-01-31 18:27:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 18:27:34,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:34,245 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:34,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 18:27:34,245 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash -959638928, now seen corresponding path program 45 times [2022-01-31 18:27:34,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:34,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666289825] [2022-01-31 18:27:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:34,247 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:34,247 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:34,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:34,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:35,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:35,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-01-31 18:27:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:35,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-01-31 18:27:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:35,093 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 18:27:35,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:35,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666289825] [2022-01-31 18:27:35,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [666289825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:35,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:35,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 18:27:35,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044485816] [2022-01-31 18:27:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:35,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 18:27:35,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 18:27:35,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1135, Invalid=1415, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:27:35,095 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 49 states have internal predecessors, (121), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:40,596 INFO L93 Difference]: Finished difference Result 661 states and 820 transitions. [2022-01-31 18:27:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 18:27:40,596 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 49 states have internal predecessors, (121), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 129 [2022-01-31 18:27:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:40,598 INFO L225 Difference]: With dead ends: 661 [2022-01-31 18:27:40,598 INFO L226 Difference]: Without dead ends: 607 [2022-01-31 18:27:40,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3602, Invalid=6700, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:27:40,599 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1735 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:40,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 37 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:27:40,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-31 18:27:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 153. [2022-01-31 18:27:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 140 states have (on average 1.0857142857142856) internal successors, (152), 142 states have internal predecessors, (152), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:27:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 165 transitions. [2022-01-31 18:27:40,706 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 165 transitions. Word has length 129 [2022-01-31 18:27:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:40,707 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 165 transitions. [2022-01-31 18:27:40,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 49 states have internal predecessors, (121), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 165 transitions. [2022-01-31 18:27:40,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 18:27:40,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:40,707 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:40,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 18:27:40,707 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1320037102, now seen corresponding path program 46 times [2022-01-31 18:27:40,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:40,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529325180] [2022-01-31 18:27:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:40,710 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:40,710 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:40,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:40,714 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:41,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:41,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-31 18:27:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:41,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-31 18:27:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:41,574 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 18:27:41,574 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529325180] [2022-01-31 18:27:41,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1529325180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:41,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:41,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 18:27:41,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386322932] [2022-01-31 18:27:41,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:41,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 18:27:41,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 18:27:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1183, Invalid=1469, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:27:41,576 INFO L87 Difference]: Start difference. First operand 153 states and 165 transitions. Second operand has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 50 states have internal predecessors, (123), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:47,396 INFO L93 Difference]: Finished difference Result 673 states and 835 transitions. [2022-01-31 18:27:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 18:27:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 50 states have internal predecessors, (123), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 131 [2022-01-31 18:27:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:47,399 INFO L225 Difference]: With dead ends: 673 [2022-01-31 18:27:47,399 INFO L226 Difference]: Without dead ends: 619 [2022-01-31 18:27:47,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3750, Invalid=6962, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:27:47,400 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1857 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 1028 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1857 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1028 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:47,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1857 Valid, 40 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1028 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:27:47,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-31 18:27:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 155. [2022-01-31 18:27:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 142 states have (on average 1.0845070422535212) internal successors, (154), 144 states have internal predecessors, (154), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:27:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2022-01-31 18:27:47,508 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 131 [2022-01-31 18:27:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:47,509 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2022-01-31 18:27:47,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 50 states have internal predecessors, (123), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2022-01-31 18:27:47,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 18:27:47,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:47,509 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:47,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 18:27:47,510 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:47,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:47,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1655380972, now seen corresponding path program 47 times [2022-01-31 18:27:47,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:47,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380728473] [2022-01-31 18:27:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:47,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:47,512 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:47,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:47,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:48,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:48,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-31 18:27:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:48,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 18:27:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:48,394 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:48,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380728473] [2022-01-31 18:27:48,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [380728473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:48,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:48,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 18:27:48,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911867113] [2022-01-31 18:27:48,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:48,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 18:27:48,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 18:27:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=1524, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:27:48,395 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 51 states have internal predecessors, (125), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:54,449 INFO L93 Difference]: Finished difference Result 685 states and 850 transitions. [2022-01-31 18:27:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 18:27:54,449 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 51 states have internal predecessors, (125), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 133 [2022-01-31 18:27:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:54,451 INFO L225 Difference]: With dead ends: 685 [2022-01-31 18:27:54,451 INFO L226 Difference]: Without dead ends: 631 [2022-01-31 18:27:54,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3901, Invalid=7229, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:27:54,452 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1759 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1759 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:54,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1759 Valid, 38 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [984 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:27:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-31 18:27:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 157. [2022-01-31 18:27:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 144 states have (on average 1.0833333333333333) internal successors, (156), 146 states have internal predecessors, (156), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:27:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 169 transitions. [2022-01-31 18:27:54,565 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 169 transitions. Word has length 133 [2022-01-31 18:27:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:54,565 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 169 transitions. [2022-01-31 18:27:54,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 51 states have internal predecessors, (125), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:27:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 169 transitions. [2022-01-31 18:27:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 18:27:54,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:54,566 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:54,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 18:27:54,566 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:54,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1798292842, now seen corresponding path program 48 times [2022-01-31 18:27:54,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:54,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637581960] [2022-01-31 18:27:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:54,567 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:54,568 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:54,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:54,571 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:55,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:55,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-31 18:27:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:55,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-31 18:27:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:55,503 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 18:27:55,504 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:55,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637581960] [2022-01-31 18:27:55,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [637581960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:55,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:55,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 18:27:55,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791527542] [2022-01-31 18:27:55,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:55,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 18:27:55,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:55,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 18:27:55,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1282, Invalid=1580, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:27:55,506 INFO L87 Difference]: Start difference. First operand 157 states and 169 transitions. Second operand has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 52 states have internal predecessors, (127), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:01,922 INFO L93 Difference]: Finished difference Result 697 states and 865 transitions. [2022-01-31 18:28:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 18:28:01,922 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 52 states have internal predecessors, (127), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2022-01-31 18:28:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:01,924 INFO L225 Difference]: With dead ends: 697 [2022-01-31 18:28:01,924 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 18:28:01,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4055, Invalid=7501, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:28:01,925 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1847 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 1031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1847 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1031 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:01,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1847 Valid, 37 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1031 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:28:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 18:28:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 159. [2022-01-31 18:28:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 146 states have (on average 1.082191780821918) internal successors, (158), 148 states have internal predecessors, (158), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:28:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 171 transitions. [2022-01-31 18:28:02,043 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 171 transitions. Word has length 135 [2022-01-31 18:28:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:02,043 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 171 transitions. [2022-01-31 18:28:02,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 52 states have internal predecessors, (127), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:02,044 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 171 transitions. [2022-01-31 18:28:02,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 18:28:02,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:02,044 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:02,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 18:28:02,044 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:02,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1697646440, now seen corresponding path program 49 times [2022-01-31 18:28:02,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:02,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961819024] [2022-01-31 18:28:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:02,046 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:02,046 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:02,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:02,050 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:02,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:02,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-01-31 18:28:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:02,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-31 18:28:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:02,971 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 18:28:02,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:02,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961819024] [2022-01-31 18:28:02,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1961819024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:02,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:02,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 18:28:02,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403391907] [2022-01-31 18:28:02,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:02,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 18:28:02,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:02,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 18:28:02,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=1637, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:28:02,972 INFO L87 Difference]: Start difference. First operand 159 states and 171 transitions. Second operand has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 53 states have internal predecessors, (129), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:09,662 INFO L93 Difference]: Finished difference Result 709 states and 880 transitions. [2022-01-31 18:28:09,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 18:28:09,663 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 53 states have internal predecessors, (129), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 137 [2022-01-31 18:28:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:09,665 INFO L225 Difference]: With dead ends: 709 [2022-01-31 18:28:09,665 INFO L226 Difference]: Without dead ends: 655 [2022-01-31 18:28:09,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4212, Invalid=7778, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:28:09,666 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2116 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 1172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2116 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1172 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:09,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2116 Valid, 36 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1172 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:28:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-31 18:28:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 161. [2022-01-31 18:28:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 148 states have (on average 1.0810810810810811) internal successors, (160), 150 states have internal predecessors, (160), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:28:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 173 transitions. [2022-01-31 18:28:09,795 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 173 transitions. Word has length 137 [2022-01-31 18:28:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:09,795 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 173 transitions. [2022-01-31 18:28:09,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 53 states have internal predecessors, (129), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 173 transitions. [2022-01-31 18:28:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 18:28:09,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:09,796 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:09,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 18:28:09,796 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:09,797 INFO L85 PathProgramCache]: Analyzing trace with hash -534265370, now seen corresponding path program 50 times [2022-01-31 18:28:09,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:09,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566270873] [2022-01-31 18:28:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:09,798 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:09,798 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:09,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:09,803 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:10,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:10,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-31 18:28:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:10,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-31 18:28:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:10,755 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 18:28:10,755 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:10,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566270873] [2022-01-31 18:28:10,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566270873] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:10,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:10,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 18:28:10,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950469531] [2022-01-31 18:28:10,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:10,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 18:28:10,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:10,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 18:28:10,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=1695, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:28:10,757 INFO L87 Difference]: Start difference. First operand 161 states and 173 transitions. Second operand has 56 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 54 states have internal predecessors, (131), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:17,909 INFO L93 Difference]: Finished difference Result 721 states and 895 transitions. [2022-01-31 18:28:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 18:28:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 54 states have internal predecessors, (131), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 139 [2022-01-31 18:28:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:17,911 INFO L225 Difference]: With dead ends: 721 [2022-01-31 18:28:17,911 INFO L226 Difference]: Without dead ends: 667 [2022-01-31 18:28:17,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4372, Invalid=8060, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:28:17,912 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1915 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 1075 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:17,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1915 Valid, 36 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1075 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:28:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-31 18:28:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 163. [2022-01-31 18:28:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 150 states have (on average 1.08) internal successors, (162), 152 states have internal predecessors, (162), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:28:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 175 transitions. [2022-01-31 18:28:18,051 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 175 transitions. Word has length 139 [2022-01-31 18:28:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:18,051 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 175 transitions. [2022-01-31 18:28:18,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 54 states have internal predecessors, (131), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 175 transitions. [2022-01-31 18:28:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 18:28:18,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:18,052 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:18,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 18:28:18,052 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:18,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2082133220, now seen corresponding path program 51 times [2022-01-31 18:28:18,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:18,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575759558] [2022-01-31 18:28:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:18,054 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:18,054 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:18,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:18,058 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:19,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:19,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 18:28:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:19,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 18:28:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:19,032 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:19,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575759558] [2022-01-31 18:28:19,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1575759558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:19,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:19,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 18:28:19,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830477238] [2022-01-31 18:28:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:19,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 18:28:19,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 18:28:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1438, Invalid=1754, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:28:19,034 INFO L87 Difference]: Start difference. First operand 163 states and 175 transitions. Second operand has 57 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 55 states have internal predecessors, (133), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:26,677 INFO L93 Difference]: Finished difference Result 733 states and 910 transitions. [2022-01-31 18:28:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 18:28:26,678 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 55 states have internal predecessors, (133), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 141 [2022-01-31 18:28:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:26,680 INFO L225 Difference]: With dead ends: 733 [2022-01-31 18:28:26,680 INFO L226 Difference]: Without dead ends: 679 [2022-01-31 18:28:26,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4535, Invalid=8347, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:28:26,681 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2347 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 1292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2347 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:26,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2347 Valid, 35 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1292 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:28:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-31 18:28:26,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 165. [2022-01-31 18:28:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 152 states have (on average 1.0789473684210527) internal successors, (164), 154 states have internal predecessors, (164), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:28:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2022-01-31 18:28:26,825 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 141 [2022-01-31 18:28:26,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:26,825 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2022-01-31 18:28:26,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 55 states have internal predecessors, (133), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:26,825 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2022-01-31 18:28:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 18:28:26,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:26,825 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:26,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 18:28:26,826 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash -409657246, now seen corresponding path program 52 times [2022-01-31 18:28:26,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:26,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70341424] [2022-01-31 18:28:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:26,827 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:26,828 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:26,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:26,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:27,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-31 18:28:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:27,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 18:28:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:27,851 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 18:28:27,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:27,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70341424] [2022-01-31 18:28:27,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [70341424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:27,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:27,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 18:28:27,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385845981] [2022-01-31 18:28:27,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:27,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 18:28:27,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:27,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 18:28:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1492, Invalid=1814, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:28:27,853 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 56 states have internal predecessors, (135), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:35,899 INFO L93 Difference]: Finished difference Result 745 states and 925 transitions. [2022-01-31 18:28:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 18:28:35,899 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 56 states have internal predecessors, (135), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 143 [2022-01-31 18:28:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:35,901 INFO L225 Difference]: With dead ends: 745 [2022-01-31 18:28:35,901 INFO L226 Difference]: Without dead ends: 691 [2022-01-31 18:28:35,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4701, Invalid=8639, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 18:28:35,902 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2105 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 1174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2105 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1174 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:35,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2105 Valid, 37 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1174 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:28:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-31 18:28:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 167. [2022-01-31 18:28:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 154 states have (on average 1.077922077922078) internal successors, (166), 156 states have internal predecessors, (166), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:28:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2022-01-31 18:28:36,046 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 143 [2022-01-31 18:28:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:36,047 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2022-01-31 18:28:36,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 56 states have internal predecessors, (135), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2022-01-31 18:28:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 18:28:36,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:36,047 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:36,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 18:28:36,047 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1571456096, now seen corresponding path program 53 times [2022-01-31 18:28:36,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:36,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983085533] [2022-01-31 18:28:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:36,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:36,049 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:36,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:36,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:37,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:37,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-31 18:28:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:37,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 18:28:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:37,098 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 18:28:37,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:37,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983085533] [2022-01-31 18:28:37,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [983085533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:37,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:37,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 18:28:37,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436337026] [2022-01-31 18:28:37,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:37,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 18:28:37,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:37,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 18:28:37,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1547, Invalid=1875, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:28:37,099 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand has 59 states, 59 states have (on average 2.3220338983050848) internal successors, (137), 57 states have internal predecessors, (137), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:45,556 INFO L93 Difference]: Finished difference Result 757 states and 940 transitions. [2022-01-31 18:28:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 18:28:45,556 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.3220338983050848) internal successors, (137), 57 states have internal predecessors, (137), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2022-01-31 18:28:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:45,558 INFO L225 Difference]: With dead ends: 757 [2022-01-31 18:28:45,558 INFO L226 Difference]: Without dead ends: 703 [2022-01-31 18:28:45,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4870, Invalid=8936, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:28:45,559 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2185 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:45,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 38 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1215 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:28:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-31 18:28:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 169. [2022-01-31 18:28:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 156 states have (on average 1.0769230769230769) internal successors, (168), 158 states have internal predecessors, (168), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:28:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2022-01-31 18:28:45,727 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 145 [2022-01-31 18:28:45,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:45,727 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2022-01-31 18:28:45,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.3220338983050848) internal successors, (137), 57 states have internal predecessors, (137), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2022-01-31 18:28:45,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 18:28:45,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:45,728 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:45,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 18:28:45,728 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:45,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1544101666, now seen corresponding path program 54 times [2022-01-31 18:28:45,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:45,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921073115] [2022-01-31 18:28:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:45,730 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:45,730 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:45,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:45,735 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:46,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:46,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-31 18:28:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:46,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 18:28:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:46,807 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 18:28:46,807 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:46,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921073115] [2022-01-31 18:28:46,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [921073115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:46,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:46,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 18:28:46,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699453388] [2022-01-31 18:28:46,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:46,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 18:28:46,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:46,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 18:28:46,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=1937, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:28:46,809 INFO L87 Difference]: Start difference. First operand 169 states and 181 transitions. Second operand has 60 states, 60 states have (on average 2.316666666666667) internal successors, (139), 58 states have internal predecessors, (139), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:55,640 INFO L93 Difference]: Finished difference Result 769 states and 955 transitions. [2022-01-31 18:28:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 18:28:55,640 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.316666666666667) internal successors, (139), 58 states have internal predecessors, (139), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 147 [2022-01-31 18:28:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:55,642 INFO L225 Difference]: With dead ends: 769 [2022-01-31 18:28:55,642 INFO L226 Difference]: Without dead ends: 715 [2022-01-31 18:28:55,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5042, Invalid=9238, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:28:55,643 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2186 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 1222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2186 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1222 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:55,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2186 Valid, 40 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1222 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:28:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-31 18:28:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 171. [2022-01-31 18:28:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 158 states have (on average 1.0759493670886076) internal successors, (170), 160 states have internal predecessors, (170), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:28:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 183 transitions. [2022-01-31 18:28:55,795 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 183 transitions. Word has length 147 [2022-01-31 18:28:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:55,795 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 183 transitions. [2022-01-31 18:28:55,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.316666666666667) internal successors, (139), 58 states have internal predecessors, (139), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:28:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 183 transitions. [2022-01-31 18:28:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 18:28:55,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:55,796 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:55,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 18:28:55,796 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:55,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2002905636, now seen corresponding path program 55 times [2022-01-31 18:28:55,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:55,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487358108] [2022-01-31 18:28:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:55,798 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:55,798 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:55,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:55,803 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:56,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:56,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 18:28:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:56,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 18:28:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:56,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:56,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487358108] [2022-01-31 18:28:56,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487358108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:56,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:56,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 18:28:56,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346168818] [2022-01-31 18:28:56,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:56,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 18:28:56,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:56,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 18:28:56,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1660, Invalid=2000, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:28:56,907 INFO L87 Difference]: Start difference. First operand 171 states and 183 transitions. Second operand has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 59 states have internal predecessors, (141), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:29:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:06,124 INFO L93 Difference]: Finished difference Result 781 states and 970 transitions. [2022-01-31 18:29:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 18:29:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 59 states have internal predecessors, (141), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2022-01-31 18:29:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:06,126 INFO L225 Difference]: With dead ends: 781 [2022-01-31 18:29:06,126 INFO L226 Difference]: Without dead ends: 727 [2022-01-31 18:29:06,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5217, Invalid=9545, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 18:29:06,128 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2457 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 1356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2457 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1356 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:06,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2457 Valid, 36 Invalid, 2402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1356 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:29:06,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-31 18:29:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 173. [2022-01-31 18:29:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 160 states have (on average 1.075) internal successors, (172), 162 states have internal predecessors, (172), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:29:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 185 transitions. [2022-01-31 18:29:06,284 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 185 transitions. Word has length 149 [2022-01-31 18:29:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:06,284 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 185 transitions. [2022-01-31 18:29:06,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 59 states have internal predecessors, (141), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:29:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 185 transitions. [2022-01-31 18:29:06,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 18:29:06,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:06,285 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:29:06,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 18:29:06,285 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:06,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash -531889318, now seen corresponding path program 56 times [2022-01-31 18:29:06,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:06,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644288097] [2022-01-31 18:29:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:06,287 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:06,287 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:06,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:06,297 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:07,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:07,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 18:29:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:07,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-01-31 18:29:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:07,471 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 18:29:07,471 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:07,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644288097] [2022-01-31 18:29:07,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [644288097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:07,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:07,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 18:29:07,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032849463] [2022-01-31 18:29:07,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:07,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 18:29:07,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 18:29:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1718, Invalid=2064, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:29:07,472 INFO L87 Difference]: Start difference. First operand 173 states and 185 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 60 states have internal predecessors, (143), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:29:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:17,094 INFO L93 Difference]: Finished difference Result 793 states and 985 transitions. [2022-01-31 18:29:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 18:29:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 60 states have internal predecessors, (143), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 151 [2022-01-31 18:29:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:17,096 INFO L225 Difference]: With dead ends: 793 [2022-01-31 18:29:17,096 INFO L226 Difference]: Without dead ends: 739 [2022-01-31 18:29:17,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5395, Invalid=9857, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 18:29:17,097 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2319 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 1291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1291 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:17,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2319 Valid, 37 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1291 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:29:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-31 18:29:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 175. [2022-01-31 18:29:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 162 states have (on average 1.0740740740740742) internal successors, (174), 164 states have internal predecessors, (174), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:29:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 187 transitions. [2022-01-31 18:29:17,258 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 187 transitions. Word has length 151 [2022-01-31 18:29:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:17,258 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 187 transitions. [2022-01-31 18:29:17,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 60 states have internal predecessors, (143), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:29:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 187 transitions. [2022-01-31 18:29:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 18:29:17,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:17,259 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:29:17,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 18:29:17,259 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash 70551896, now seen corresponding path program 57 times [2022-01-31 18:29:17,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:17,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443895238] [2022-01-31 18:29:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:17,261 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:17,261 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:17,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:17,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:18,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:18,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 18:29:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:18,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-01-31 18:29:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:18,477 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 18:29:18,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443895238] [2022-01-31 18:29:18,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443895238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:18,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:18,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 18:29:18,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667681697] [2022-01-31 18:29:18,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:18,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 18:29:18,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:18,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 18:29:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1777, Invalid=2129, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:29:18,480 INFO L87 Difference]: Start difference. First operand 175 states and 187 transitions. Second operand has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 61 states have internal predecessors, (145), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:29:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:28,480 INFO L93 Difference]: Finished difference Result 805 states and 1000 transitions. [2022-01-31 18:29:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 18:29:28,480 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 61 states have internal predecessors, (145), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2022-01-31 18:29:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:28,482 INFO L225 Difference]: With dead ends: 805 [2022-01-31 18:29:28,482 INFO L226 Difference]: Without dead ends: 751 [2022-01-31 18:29:28,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5576, Invalid=10174, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 18:29:28,483 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2274 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 1271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2274 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1271 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:28,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2274 Valid, 39 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1271 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:29:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-31 18:29:28,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 177. [2022-01-31 18:29:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 164 states have (on average 1.0731707317073171) internal successors, (176), 166 states have internal predecessors, (176), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:29:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 189 transitions. [2022-01-31 18:29:28,656 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 189 transitions. Word has length 153 [2022-01-31 18:29:28,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:28,656 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 189 transitions. [2022-01-31 18:29:28,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 61 states have internal predecessors, (145), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:29:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 189 transitions. [2022-01-31 18:29:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 18:29:28,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:28,657 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:29:28,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 18:29:28,657 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:28,657 INFO L85 PathProgramCache]: Analyzing trace with hash -804026410, now seen corresponding path program 58 times [2022-01-31 18:29:28,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:28,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999878146] [2022-01-31 18:29:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:28,658 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:28,658 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:28,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:28,664 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:29,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:29,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 18:29:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:29,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-01-31 18:29:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:29,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:29,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999878146] [2022-01-31 18:29:29,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [999878146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:29,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:29,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 18:29:29,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347430894] [2022-01-31 18:29:29,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:29,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 18:29:29,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 18:29:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1837, Invalid=2195, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:29:29,868 INFO L87 Difference]: Start difference. First operand 177 states and 189 transitions. Second operand has 64 states, 64 states have (on average 2.296875) internal successors, (147), 62 states have internal predecessors, (147), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:29:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:40,315 INFO L93 Difference]: Finished difference Result 817 states and 1015 transitions. [2022-01-31 18:29:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 18:29:40,316 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.296875) internal successors, (147), 62 states have internal predecessors, (147), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2022-01-31 18:29:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:40,318 INFO L225 Difference]: With dead ends: 817 [2022-01-31 18:29:40,318 INFO L226 Difference]: Without dead ends: 763 [2022-01-31 18:29:40,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5760, Invalid=10496, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 18:29:40,319 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2399 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 1335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2399 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1335 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:40,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2399 Valid, 37 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1335 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:29:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-31 18:29:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 179. [2022-01-31 18:29:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 166 states have (on average 1.072289156626506) internal successors, (178), 168 states have internal predecessors, (178), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:29:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 191 transitions. [2022-01-31 18:29:40,495 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 191 transitions. Word has length 155 [2022-01-31 18:29:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:40,495 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 191 transitions. [2022-01-31 18:29:40,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.296875) internal successors, (147), 62 states have internal predecessors, (147), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:29:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 191 transitions. [2022-01-31 18:29:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 18:29:40,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:40,496 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:29:40,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 18:29:40,496 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:40,497 INFO L85 PathProgramCache]: Analyzing trace with hash 539811540, now seen corresponding path program 59 times [2022-01-31 18:29:40,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:40,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769723500] [2022-01-31 18:29:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:40,499 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:40,499 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:40,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:40,505 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:41,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:41,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 18:29:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:41,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-31 18:29:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:41,755 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 18:29:41,755 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:41,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769723500] [2022-01-31 18:29:41,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1769723500] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:41,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:41,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 18:29:41,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477336602] [2022-01-31 18:29:41,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:41,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 18:29:41,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:41,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 18:29:41,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1898, Invalid=2262, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:29:41,757 INFO L87 Difference]: Start difference. First operand 179 states and 191 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 63 states have internal predecessors, (149), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:29:52,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:52,754 INFO L93 Difference]: Finished difference Result 829 states and 1030 transitions. [2022-01-31 18:29:52,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:29:52,754 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 63 states have internal predecessors, (149), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 157 [2022-01-31 18:29:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:52,756 INFO L225 Difference]: With dead ends: 829 [2022-01-31 18:29:52,756 INFO L226 Difference]: Without dead ends: 775 [2022-01-31 18:29:52,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5947, Invalid=10823, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 18:29:52,757 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2752 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 1514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2752 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1514 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:52,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2752 Valid, 36 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1514 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:29:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-31 18:29:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 181. [2022-01-31 18:29:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 168 states have (on average 1.0714285714285714) internal successors, (180), 170 states have internal predecessors, (180), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:29:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 193 transitions. [2022-01-31 18:29:52,937 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 193 transitions. Word has length 157 [2022-01-31 18:29:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:52,937 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 193 transitions. [2022-01-31 18:29:52,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 63 states have internal predecessors, (149), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:29:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 193 transitions. [2022-01-31 18:29:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 18:29:52,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:52,938 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:29:52,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 18:29:52,938 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash -817074606, now seen corresponding path program 60 times [2022-01-31 18:29:52,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:52,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138261370] [2022-01-31 18:29:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:52,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:52,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:52,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:52,945 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:54,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:54,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-01-31 18:29:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:54,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-01-31 18:29:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:54,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:54,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138261370] [2022-01-31 18:29:54,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138261370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:54,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:54,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 18:29:54,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391619869] [2022-01-31 18:29:54,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:54,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 18:29:54,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 18:29:54,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1960, Invalid=2330, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:29:54,220 INFO L87 Difference]: Start difference. First operand 181 states and 193 transitions. Second operand has 66 states, 66 states have (on average 2.287878787878788) internal successors, (151), 64 states have internal predecessors, (151), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:30:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:05,603 INFO L93 Difference]: Finished difference Result 841 states and 1045 transitions. [2022-01-31 18:30:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:30:05,603 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.287878787878788) internal successors, (151), 64 states have internal predecessors, (151), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 159 [2022-01-31 18:30:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:05,606 INFO L225 Difference]: With dead ends: 841 [2022-01-31 18:30:05,606 INFO L226 Difference]: Without dead ends: 787 [2022-01-31 18:30:05,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6137, Invalid=11155, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 18:30:05,607 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2662 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 1471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2662 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1471 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:05,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2662 Valid, 36 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1471 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:30:05,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-31 18:30:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 183. [2022-01-31 18:30:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 170 states have (on average 1.0705882352941176) internal successors, (182), 172 states have internal predecessors, (182), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:30:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 195 transitions. [2022-01-31 18:30:05,795 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 195 transitions. Word has length 159 [2022-01-31 18:30:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:05,795 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 195 transitions. [2022-01-31 18:30:05,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.287878787878788) internal successors, (151), 64 states have internal predecessors, (151), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:30:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 195 transitions. [2022-01-31 18:30:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 18:30:05,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:05,796 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:05,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 18:30:05,796 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:05,797 INFO L85 PathProgramCache]: Analyzing trace with hash 885397072, now seen corresponding path program 61 times [2022-01-31 18:30:05,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:05,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837481820] [2022-01-31 18:30:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:05,798 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:05,798 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:05,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:05,804 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:07,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:07,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-01-31 18:30:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:07,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-31 18:30:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:07,124 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 18:30:07,124 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:07,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837481820] [2022-01-31 18:30:07,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837481820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:07,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:07,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 18:30:07,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536802553] [2022-01-31 18:30:07,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:07,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 18:30:07,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:07,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 18:30:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2023, Invalid=2399, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:30:07,126 INFO L87 Difference]: Start difference. First operand 183 states and 195 transitions. Second operand has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 65 states have internal predecessors, (153), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:30:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:19,167 INFO L93 Difference]: Finished difference Result 853 states and 1060 transitions. [2022-01-31 18:30:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:30:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 65 states have internal predecessors, (153), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 161 [2022-01-31 18:30:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:19,169 INFO L225 Difference]: With dead ends: 853 [2022-01-31 18:30:19,169 INFO L226 Difference]: Without dead ends: 799 [2022-01-31 18:30:19,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6330, Invalid=11492, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 18:30:19,171 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2434 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 1357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1357 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:19,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2434 Valid, 38 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1357 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:30:19,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-31 18:30:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 185. [2022-01-31 18:30:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 172 states have (on average 1.069767441860465) internal successors, (184), 174 states have internal predecessors, (184), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:30:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 197 transitions. [2022-01-31 18:30:19,364 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 197 transitions. Word has length 161 [2022-01-31 18:30:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:19,364 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 197 transitions. [2022-01-31 18:30:19,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 65 states have internal predecessors, (153), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:30:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 197 transitions. [2022-01-31 18:30:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 18:30:19,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:19,365 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:19,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 18:30:19,365 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:19,366 INFO L85 PathProgramCache]: Analyzing trace with hash 578139854, now seen corresponding path program 62 times [2022-01-31 18:30:19,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:19,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834277035] [2022-01-31 18:30:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:19,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:19,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:19,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:19,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:20,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:20,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-01-31 18:30:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:20,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-01-31 18:30:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:20,744 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 18:30:20,744 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:20,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834277035] [2022-01-31 18:30:20,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [834277035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:20,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:20,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 18:30:20,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524993719] [2022-01-31 18:30:20,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:20,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 18:30:20,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:20,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 18:30:20,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2087, Invalid=2469, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:30:20,746 INFO L87 Difference]: Start difference. First operand 185 states and 197 transitions. Second operand has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 66 states have internal predecessors, (155), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:30:33,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:33,379 INFO L93 Difference]: Finished difference Result 865 states and 1075 transitions. [2022-01-31 18:30:33,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 18:30:33,379 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 66 states have internal predecessors, (155), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 163 [2022-01-31 18:30:33,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:33,382 INFO L225 Difference]: With dead ends: 865 [2022-01-31 18:30:33,382 INFO L226 Difference]: Without dead ends: 811 [2022-01-31 18:30:33,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6526, Invalid=11834, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 18:30:33,383 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3104 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 1696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3104 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1696 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:33,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3104 Valid, 36 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1696 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:30:33,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-31 18:30:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 187. [2022-01-31 18:30:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 174 states have (on average 1.0689655172413792) internal successors, (186), 176 states have internal predecessors, (186), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:30:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 199 transitions. [2022-01-31 18:30:33,584 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 199 transitions. Word has length 163 [2022-01-31 18:30:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:33,585 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 199 transitions. [2022-01-31 18:30:33,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 66 states have internal predecessors, (155), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:30:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 199 transitions. [2022-01-31 18:30:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 18:30:33,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:33,585 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:33,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:30:33,586 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:33,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1656696780, now seen corresponding path program 63 times [2022-01-31 18:30:33,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:33,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394069845] [2022-01-31 18:30:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:33,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:33,588 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:33,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:33,594 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:34,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:34,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-31 18:30:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:34,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-01-31 18:30:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:30:35,002 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:35,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394069845] [2022-01-31 18:30:35,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [394069845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:35,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:35,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:30:35,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889276443] [2022-01-31 18:30:35,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:35,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:30:35,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:35,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:30:35,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2152, Invalid=2540, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:30:35,004 INFO L87 Difference]: Start difference. First operand 187 states and 199 transitions. Second operand has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 67 states have internal predecessors, (157), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:30:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:48,363 INFO L93 Difference]: Finished difference Result 877 states and 1090 transitions. [2022-01-31 18:30:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:30:48,363 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 67 states have internal predecessors, (157), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 165 [2022-01-31 18:30:48,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:48,365 INFO L225 Difference]: With dead ends: 877 [2022-01-31 18:30:48,365 INFO L226 Difference]: Without dead ends: 823 [2022-01-31 18:30:48,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6725, Invalid=12181, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 18:30:48,367 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2298 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:48,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2298 Valid, 42 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:30:48,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-31 18:30:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 189. [2022-01-31 18:30:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 176 states have (on average 1.0681818181818181) internal successors, (188), 178 states have internal predecessors, (188), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:30:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 201 transitions. [2022-01-31 18:30:48,575 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 201 transitions. Word has length 165 [2022-01-31 18:30:48,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:48,575 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 201 transitions. [2022-01-31 18:30:48,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 67 states have internal predecessors, (157), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:30:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 201 transitions. [2022-01-31 18:30:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 18:30:48,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:48,576 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:48,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:30:48,576 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1232182966, now seen corresponding path program 64 times [2022-01-31 18:30:48,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:48,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127097359] [2022-01-31 18:30:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:48,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:48,578 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:48,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:48,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:49,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:50,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-01-31 18:30:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:50,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-01-31 18:30:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:50,024 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 18:30:50,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:50,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127097359] [2022-01-31 18:30:50,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1127097359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:50,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:50,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:30:50,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031831498] [2022-01-31 18:30:50,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:50,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 18:30:50,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 18:30:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2218, Invalid=2612, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:30:50,026 INFO L87 Difference]: Start difference. First operand 189 states and 201 transitions. Second operand has 70 states, 70 states have (on average 2.2714285714285714) internal successors, (159), 68 states have internal predecessors, (159), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:31:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:03,780 INFO L93 Difference]: Finished difference Result 889 states and 1105 transitions. [2022-01-31 18:31:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:31:03,781 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.2714285714285714) internal successors, (159), 68 states have internal predecessors, (159), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 167 [2022-01-31 18:31:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:03,783 INFO L225 Difference]: With dead ends: 889 [2022-01-31 18:31:03,783 INFO L226 Difference]: Without dead ends: 835 [2022-01-31 18:31:03,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6927, Invalid=12533, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 18:31:03,784 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2509 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 1402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1402 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:03,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2509 Valid, 38 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1402 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:31:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-31 18:31:03,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 191. [2022-01-31 18:31:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 178 states have (on average 1.0674157303370786) internal successors, (190), 180 states have internal predecessors, (190), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:31:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 203 transitions. [2022-01-31 18:31:03,997 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 203 transitions. Word has length 167 [2022-01-31 18:31:03,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:03,997 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 203 transitions. [2022-01-31 18:31:03,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.2714285714285714) internal successors, (159), 68 states have internal predecessors, (159), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:31:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 203 transitions. [2022-01-31 18:31:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 18:31:03,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:03,998 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:03,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:31:03,998 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1398221640, now seen corresponding path program 65 times [2022-01-31 18:31:03,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:03,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92055472] [2022-01-31 18:31:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:03,999 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:04,000 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:04,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:04,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:05,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:05,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-31 18:31:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:05,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-01-31 18:31:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:05,504 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 18:31:05,504 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:05,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92055472] [2022-01-31 18:31:05,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [92055472] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:05,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:05,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:31:05,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621073718] [2022-01-31 18:31:05,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:05,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:31:05,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:05,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:31:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2285, Invalid=2685, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:31:05,506 INFO L87 Difference]: Start difference. First operand 191 states and 203 transitions. Second operand has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 69 states have internal predecessors, (161), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:31:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:20,032 INFO L93 Difference]: Finished difference Result 901 states and 1120 transitions. [2022-01-31 18:31:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:31:20,032 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 69 states have internal predecessors, (161), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 169 [2022-01-31 18:31:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:20,034 INFO L225 Difference]: With dead ends: 901 [2022-01-31 18:31:20,034 INFO L226 Difference]: Without dead ends: 847 [2022-01-31 18:31:20,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7132, Invalid=12890, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 18:31:20,036 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2799 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 1554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2799 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1554 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:20,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2799 Valid, 38 Invalid, 2832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1554 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:31:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-01-31 18:31:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 193. [2022-01-31 18:31:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 180 states have (on average 1.0666666666666667) internal successors, (192), 182 states have internal predecessors, (192), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:31:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 205 transitions. [2022-01-31 18:31:20,262 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 205 transitions. Word has length 169 [2022-01-31 18:31:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:20,262 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 205 transitions. [2022-01-31 18:31:20,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 69 states have internal predecessors, (161), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:31:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 205 transitions. [2022-01-31 18:31:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 18:31:20,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:20,263 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:20,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:31:20,263 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:20,264 INFO L85 PathProgramCache]: Analyzing trace with hash -518689338, now seen corresponding path program 66 times [2022-01-31 18:31:20,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:20,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361085116] [2022-01-31 18:31:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:20,265 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:20,265 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:20,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:20,273 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:21,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:21,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-01-31 18:31:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:21,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-01-31 18:31:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:21,887 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 18:31:21,887 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:21,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361085116] [2022-01-31 18:31:21,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [361085116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:21,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:21,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:31:21,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049771068] [2022-01-31 18:31:21,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:21,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:31:21,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:21,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:31:21,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=2759, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:31:21,890 INFO L87 Difference]: Start difference. First operand 193 states and 205 transitions. Second operand has 72 states, 72 states have (on average 2.263888888888889) internal successors, (163), 70 states have internal predecessors, (163), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:31:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:37,140 INFO L93 Difference]: Finished difference Result 913 states and 1135 transitions. [2022-01-31 18:31:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:31:37,141 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.263888888888889) internal successors, (163), 70 states have internal predecessors, (163), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 171 [2022-01-31 18:31:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:37,142 INFO L225 Difference]: With dead ends: 913 [2022-01-31 18:31:37,143 INFO L226 Difference]: Without dead ends: 859 [2022-01-31 18:31:37,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7340, Invalid=13252, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 18:31:37,144 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2693 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 1501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2693 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1501 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:37,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2693 Valid, 38 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1501 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:31:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-31 18:31:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 195. [2022-01-31 18:31:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 182 states have (on average 1.065934065934066) internal successors, (194), 184 states have internal predecessors, (194), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:31:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 207 transitions. [2022-01-31 18:31:37,377 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 207 transitions. Word has length 171 [2022-01-31 18:31:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:37,378 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 207 transitions. [2022-01-31 18:31:37,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.263888888888889) internal successors, (163), 70 states have internal predecessors, (163), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:31:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 207 transitions. [2022-01-31 18:31:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 18:31:37,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:37,378 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:37,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:31:37,379 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash -129169212, now seen corresponding path program 67 times [2022-01-31 18:31:37,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:37,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567067444] [2022-01-31 18:31:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:37,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:37,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:37,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:37,388 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:38,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:38,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-01-31 18:31:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:38,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-31 18:31:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:38,970 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 18:31:38,970 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:38,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567067444] [2022-01-31 18:31:38,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567067444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:38,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:38,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:31:38,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591511713] [2022-01-31 18:31:38,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:38,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:31:38,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:38,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:31:38,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2422, Invalid=2834, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:31:38,972 INFO L87 Difference]: Start difference. First operand 195 states and 207 transitions. Second operand has 73 states, 73 states have (on average 2.26027397260274) internal successors, (165), 71 states have internal predecessors, (165), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:31:54,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:54,896 INFO L93 Difference]: Finished difference Result 925 states and 1150 transitions. [2022-01-31 18:31:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:31:54,896 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.26027397260274) internal successors, (165), 71 states have internal predecessors, (165), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 173 [2022-01-31 18:31:54,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:54,898 INFO L225 Difference]: With dead ends: 925 [2022-01-31 18:31:54,898 INFO L226 Difference]: Without dead ends: 871 [2022-01-31 18:31:54,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7551, Invalid=13619, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 18:31:54,899 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2886 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 1605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2886 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1605 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:54,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2886 Valid, 35 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1605 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:31:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-01-31 18:31:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 197. [2022-01-31 18:31:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 184 states have (on average 1.065217391304348) internal successors, (196), 186 states have internal predecessors, (196), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:31:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 209 transitions. [2022-01-31 18:31:55,140 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 209 transitions. Word has length 173 [2022-01-31 18:31:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:55,140 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 209 transitions. [2022-01-31 18:31:55,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.26027397260274) internal successors, (165), 71 states have internal predecessors, (165), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:31:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 209 transitions. [2022-01-31 18:31:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 18:31:55,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:55,141 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:55,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:31:55,141 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:55,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:55,141 INFO L85 PathProgramCache]: Analyzing trace with hash 537517122, now seen corresponding path program 68 times [2022-01-31 18:31:55,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:55,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144782296] [2022-01-31 18:31:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:55,143 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:55,143 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:55,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:55,150 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:56,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:56,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-01-31 18:31:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:56,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-01-31 18:31:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:31:56,749 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:56,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144782296] [2022-01-31 18:31:56,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144782296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:56,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:56,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:31:56,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72507071] [2022-01-31 18:31:56,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:56,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:31:56,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:31:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2492, Invalid=2910, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:31:56,751 INFO L87 Difference]: Start difference. First operand 197 states and 209 transitions. Second operand has 74 states, 74 states have (on average 2.2567567567567566) internal successors, (167), 72 states have internal predecessors, (167), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:32:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:13,507 INFO L93 Difference]: Finished difference Result 937 states and 1165 transitions. [2022-01-31 18:32:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:32:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2567567567567566) internal successors, (167), 72 states have internal predecessors, (167), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 175 [2022-01-31 18:32:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:13,509 INFO L225 Difference]: With dead ends: 937 [2022-01-31 18:32:13,509 INFO L226 Difference]: Without dead ends: 883 [2022-01-31 18:32:13,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7765, Invalid=13991, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 18:32:13,510 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2713 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 1520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2713 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1520 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:13,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2713 Valid, 37 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1520 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:32:13,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-31 18:32:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 199. [2022-01-31 18:32:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 186 states have (on average 1.064516129032258) internal successors, (198), 188 states have internal predecessors, (198), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:32:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 211 transitions. [2022-01-31 18:32:13,758 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 211 transitions. Word has length 175 [2022-01-31 18:32:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:13,758 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 211 transitions. [2022-01-31 18:32:13,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2567567567567566) internal successors, (167), 72 states have internal predecessors, (167), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:32:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 211 transitions. [2022-01-31 18:32:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 18:32:13,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:13,759 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:13,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:32:13,759 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1272956992, now seen corresponding path program 69 times [2022-01-31 18:32:13,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:13,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248211051] [2022-01-31 18:32:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:13,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:13,761 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:13,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:13,769 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:15,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:15,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-01-31 18:32:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:15,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-01-31 18:32:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:15,429 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 18:32:15,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:15,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248211051] [2022-01-31 18:32:15,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248211051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:15,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:15,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:32:15,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129257918] [2022-01-31 18:32:15,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:15,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:32:15,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:15,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:32:15,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2563, Invalid=2987, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:32:15,431 INFO L87 Difference]: Start difference. First operand 199 states and 211 transitions. Second operand has 75 states, 75 states have (on average 2.2533333333333334) internal successors, (169), 73 states have internal predecessors, (169), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:32:32,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:32,883 INFO L93 Difference]: Finished difference Result 949 states and 1180 transitions. [2022-01-31 18:32:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:32:32,883 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.2533333333333334) internal successors, (169), 73 states have internal predecessors, (169), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 177 [2022-01-31 18:32:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:32,885 INFO L225 Difference]: With dead ends: 949 [2022-01-31 18:32:32,885 INFO L226 Difference]: Without dead ends: 895 [2022-01-31 18:32:32,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=7982, Invalid=14368, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 18:32:32,887 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2651 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 1490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2651 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1490 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:32,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2651 Valid, 41 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1490 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:32:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-31 18:32:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 201. [2022-01-31 18:32:33,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 188 states have (on average 1.0638297872340425) internal successors, (200), 190 states have internal predecessors, (200), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:32:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 213 transitions. [2022-01-31 18:32:33,135 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 213 transitions. Word has length 177 [2022-01-31 18:32:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:33,135 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 213 transitions. [2022-01-31 18:32:33,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.2533333333333334) internal successors, (169), 73 states have internal predecessors, (169), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:32:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 213 transitions. [2022-01-31 18:32:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 18:32:33,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:33,136 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:33,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:32:33,136 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:33,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:33,136 INFO L85 PathProgramCache]: Analyzing trace with hash -638931778, now seen corresponding path program 70 times [2022-01-31 18:32:33,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:33,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150207174] [2022-01-31 18:32:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:33,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:33,138 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:33,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:33,146 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:34,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:34,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-01-31 18:32:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:34,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-01-31 18:32:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:34,856 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 18:32:34,857 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:34,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150207174] [2022-01-31 18:32:34,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [150207174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:34,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:34,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:32:34,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298387330] [2022-01-31 18:32:34,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:34,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:32:34,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:34,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:32:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2635, Invalid=3065, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:32:34,859 INFO L87 Difference]: Start difference. First operand 201 states and 213 transitions. Second operand has 76 states, 76 states have (on average 2.25) internal successors, (171), 74 states have internal predecessors, (171), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:32:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:52,770 INFO L93 Difference]: Finished difference Result 961 states and 1195 transitions. [2022-01-31 18:32:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:32:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.25) internal successors, (171), 74 states have internal predecessors, (171), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 179 [2022-01-31 18:32:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:52,772 INFO L225 Difference]: With dead ends: 961 [2022-01-31 18:32:52,772 INFO L226 Difference]: Without dead ends: 907 [2022-01-31 18:32:52,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=8202, Invalid=14750, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 18:32:52,773 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2713 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 1520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2713 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1520 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:52,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2713 Valid, 36 Invalid, 2832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1520 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:32:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-31 18:32:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 203. [2022-01-31 18:32:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 190 states have (on average 1.063157894736842) internal successors, (202), 192 states have internal predecessors, (202), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:32:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 215 transitions. [2022-01-31 18:32:53,031 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 215 transitions. Word has length 179 [2022-01-31 18:32:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:53,031 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 215 transitions. [2022-01-31 18:32:53,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.25) internal successors, (171), 74 states have internal predecessors, (171), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:32:53,031 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 215 transitions. [2022-01-31 18:32:53,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 18:32:53,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:53,032 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:53,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:32:53,032 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:53,032 INFO L85 PathProgramCache]: Analyzing trace with hash 281962940, now seen corresponding path program 71 times [2022-01-31 18:32:53,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:53,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22836294] [2022-01-31 18:32:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:53,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:53,033 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:53,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:53,041 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:54,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:54,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-31 18:32:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:54,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-01-31 18:32:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:54,804 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 18:32:54,804 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:54,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22836294] [2022-01-31 18:32:54,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [22836294] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:54,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:54,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:32:54,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252426996] [2022-01-31 18:32:54,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:54,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:32:54,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:54,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:32:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2708, Invalid=3144, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:32:54,806 INFO L87 Difference]: Start difference. First operand 203 states and 215 transitions. Second operand has 77 states, 77 states have (on average 2.2467532467532467) internal successors, (173), 75 states have internal predecessors, (173), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:33:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:33:13,427 INFO L93 Difference]: Finished difference Result 973 states and 1210 transitions. [2022-01-31 18:33:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:33:13,428 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2467532467532467) internal successors, (173), 75 states have internal predecessors, (173), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 181 [2022-01-31 18:33:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:33:13,429 INFO L225 Difference]: With dead ends: 973 [2022-01-31 18:33:13,429 INFO L226 Difference]: Without dead ends: 919 [2022-01-31 18:33:13,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=8425, Invalid=15137, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 18:33:13,431 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2853 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 1596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2853 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1596 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:33:13,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2853 Valid, 38 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1596 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:33:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-01-31 18:33:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 205. [2022-01-31 18:33:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 192 states have (on average 1.0625) internal successors, (204), 194 states have internal predecessors, (204), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:33:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 217 transitions. [2022-01-31 18:33:13,696 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 217 transitions. Word has length 181 [2022-01-31 18:33:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:33:13,696 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 217 transitions. [2022-01-31 18:33:13,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2467532467532467) internal successors, (173), 75 states have internal predecessors, (173), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:33:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 217 transitions. [2022-01-31 18:33:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 18:33:13,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:33:13,697 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:33:13,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:33:13,697 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:33:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:33:13,697 INFO L85 PathProgramCache]: Analyzing trace with hash 498523962, now seen corresponding path program 72 times [2022-01-31 18:33:13,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:33:13,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498269781] [2022-01-31 18:33:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:33:13,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:33:13,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:33:13,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:33:13,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:33:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:15,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:33:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:15,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-01-31 18:33:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:15,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-01-31 18:33:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:15,513 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 18:33:15,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:33:15,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498269781] [2022-01-31 18:33:15,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498269781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:33:15,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:33:15,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:33:15,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291250616] [2022-01-31 18:33:15,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:33:15,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:33:15,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:33:15,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:33:15,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2782, Invalid=3224, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:33:15,515 INFO L87 Difference]: Start difference. First operand 205 states and 217 transitions. Second operand has 78 states, 78 states have (on average 2.2435897435897436) internal successors, (175), 76 states have internal predecessors, (175), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:33:35,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:33:35,550 INFO L93 Difference]: Finished difference Result 985 states and 1225 transitions. [2022-01-31 18:33:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:33:35,551 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.2435897435897436) internal successors, (175), 76 states have internal predecessors, (175), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 183 [2022-01-31 18:33:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:33:35,553 INFO L225 Difference]: With dead ends: 985 [2022-01-31 18:33:35,553 INFO L226 Difference]: Without dead ends: 931 [2022-01-31 18:33:35,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=8651, Invalid=15529, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 18:33:35,554 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2956 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 1647 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2956 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1647 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:33:35,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2956 Valid, 39 Invalid, 3124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1647 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:33:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-01-31 18:33:35,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 207. [2022-01-31 18:33:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 194 states have (on average 1.0618556701030928) internal successors, (206), 196 states have internal predecessors, (206), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:33:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 219 transitions. [2022-01-31 18:33:35,863 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 219 transitions. Word has length 183 [2022-01-31 18:33:35,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:33:35,863 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 219 transitions. [2022-01-31 18:33:35,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.2435897435897436) internal successors, (175), 76 states have internal predecessors, (175), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:33:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 219 transitions. [2022-01-31 18:33:35,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 18:33:35,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:33:35,864 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:33:35,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:33:35,864 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:33:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:33:35,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1839731400, now seen corresponding path program 73 times [2022-01-31 18:33:35,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:33:35,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935027330] [2022-01-31 18:33:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:33:35,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:33:35,866 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:33:35,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:33:35,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:33:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:37,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:33:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:37,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-01-31 18:33:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:37,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-01-31 18:33:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:37,754 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 18:33:37,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:33:37,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935027330] [2022-01-31 18:33:37,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935027330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:33:37,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:33:37,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:33:37,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638595230] [2022-01-31 18:33:37,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:33:37,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:33:37,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:33:37,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:33:37,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2857, Invalid=3305, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:33:37,757 INFO L87 Difference]: Start difference. First operand 207 states and 219 transitions. Second operand has 79 states, 79 states have (on average 2.240506329113924) internal successors, (177), 77 states have internal predecessors, (177), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:33:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:33:58,990 INFO L93 Difference]: Finished difference Result 997 states and 1240 transitions. [2022-01-31 18:33:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:33:58,990 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.240506329113924) internal successors, (177), 77 states have internal predecessors, (177), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 185 [2022-01-31 18:33:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:33:58,992 INFO L225 Difference]: With dead ends: 997 [2022-01-31 18:33:58,992 INFO L226 Difference]: Without dead ends: 943 [2022-01-31 18:33:58,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8880, Invalid=15926, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 18:33:58,994 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3396 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 1879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3396 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1879 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:33:58,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3396 Valid, 39 Invalid, 3294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1879 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:33:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-01-31 18:33:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 209. [2022-01-31 18:33:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 196 states have (on average 1.0612244897959184) internal successors, (208), 198 states have internal predecessors, (208), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:33:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 221 transitions. [2022-01-31 18:33:59,278 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 221 transitions. Word has length 185 [2022-01-31 18:33:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:33:59,278 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 221 transitions. [2022-01-31 18:33:59,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.240506329113924) internal successors, (177), 77 states have internal predecessors, (177), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:33:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 221 transitions. [2022-01-31 18:33:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 18:33:59,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:33:59,279 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:33:59,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:33:59,279 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:33:59,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:33:59,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1659728822, now seen corresponding path program 74 times [2022-01-31 18:33:59,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:33:59,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259633272] [2022-01-31 18:33:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:33:59,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:33:59,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:33:59,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:33:59,289 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:33:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:01,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:34:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:01,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-01-31 18:34:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:01,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-01-31 18:34:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:01,170 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 18:34:01,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:34:01,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259633272] [2022-01-31 18:34:01,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259633272] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:34:01,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:34:01,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:34:01,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820857466] [2022-01-31 18:34:01,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:34:01,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:34:01,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:34:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:34:01,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2933, Invalid=3387, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:34:01,172 INFO L87 Difference]: Start difference. First operand 209 states and 221 transitions. Second operand has 80 states, 80 states have (on average 2.2375) internal successors, (179), 78 states have internal predecessors, (179), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:34:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:34:23,050 INFO L93 Difference]: Finished difference Result 1009 states and 1255 transitions. [2022-01-31 18:34:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:34:23,050 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2375) internal successors, (179), 78 states have internal predecessors, (179), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 187 [2022-01-31 18:34:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:34:23,052 INFO L225 Difference]: With dead ends: 1009 [2022-01-31 18:34:23,052 INFO L226 Difference]: Without dead ends: 955 [2022-01-31 18:34:23,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9112, Invalid=16328, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 18:34:23,053 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3140 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 1746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3140 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1746 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:34:23,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3140 Valid, 38 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1746 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:34:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-01-31 18:34:23,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 211. [2022-01-31 18:34:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 198 states have (on average 1.0606060606060606) internal successors, (210), 200 states have internal predecessors, (210), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:34:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 223 transitions. [2022-01-31 18:34:23,349 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 223 transitions. Word has length 187 [2022-01-31 18:34:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:34:23,350 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 223 transitions. [2022-01-31 18:34:23,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2375) internal successors, (179), 78 states have internal predecessors, (179), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:34:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 223 transitions. [2022-01-31 18:34:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 18:34:23,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:34:23,350 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:23,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:34:23,351 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:34:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:34:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1681609396, now seen corresponding path program 75 times [2022-01-31 18:34:23,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:34:23,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842234836] [2022-01-31 18:34:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:34:23,356 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:34:23,356 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:34:23,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:34:23,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:34:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:25,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:34:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:25,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-01-31 18:34:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:25,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-01-31 18:34:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:25,306 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 18:34:25,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:34:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842234836] [2022-01-31 18:34:25,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1842234836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:34:25,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:34:25,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:34:25,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889577717] [2022-01-31 18:34:25,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:34:25,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:34:25,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:34:25,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:34:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3010, Invalid=3470, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:34:25,308 INFO L87 Difference]: Start difference. First operand 211 states and 223 transitions. Second operand has 81 states, 81 states have (on average 2.234567901234568) internal successors, (181), 79 states have internal predecessors, (181), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:34:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:34:47,813 INFO L93 Difference]: Finished difference Result 1021 states and 1270 transitions. [2022-01-31 18:34:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:34:47,813 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.234567901234568) internal successors, (181), 79 states have internal predecessors, (181), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 189 [2022-01-31 18:34:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:34:47,815 INFO L225 Difference]: With dead ends: 1021 [2022-01-31 18:34:47,815 INFO L226 Difference]: Without dead ends: 967 [2022-01-31 18:34:47,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9347, Invalid=16735, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 18:34:47,817 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3200 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 1776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3200 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 3185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1776 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:34:47,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3200 Valid, 36 Invalid, 3185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1776 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:34:47,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-01-31 18:34:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 213. [2022-01-31 18:34:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 200 states have (on average 1.06) internal successors, (212), 202 states have internal predecessors, (212), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:34:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 225 transitions. [2022-01-31 18:34:48,124 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 225 transitions. Word has length 189 [2022-01-31 18:34:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:34:48,124 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 225 transitions. [2022-01-31 18:34:48,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.234567901234568) internal successors, (181), 79 states have internal predecessors, (181), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:34:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 225 transitions. [2022-01-31 18:34:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 18:34:48,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:34:48,125 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:34:48,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:34:48,125 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:34:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:34:48,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1234004530, now seen corresponding path program 76 times [2022-01-31 18:34:48,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:34:48,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494416257] [2022-01-31 18:34:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:34:48,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:34:48,127 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:34:48,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:34:48,135 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:34:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:50,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:34:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:50,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-01-31 18:34:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:50,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-01-31 18:34:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:50,155 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 18:34:50,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:34:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494416257] [2022-01-31 18:34:50,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1494416257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:34:50,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:34:50,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:34:50,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967878578] [2022-01-31 18:34:50,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:34:50,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:34:50,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:34:50,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:34:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3088, Invalid=3554, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:34:50,158 INFO L87 Difference]: Start difference. First operand 213 states and 225 transitions. Second operand has 82 states, 82 states have (on average 2.231707317073171) internal successors, (183), 80 states have internal predecessors, (183), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:35:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:35:13,258 INFO L93 Difference]: Finished difference Result 1033 states and 1285 transitions. [2022-01-31 18:35:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:35:13,259 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.231707317073171) internal successors, (183), 80 states have internal predecessors, (183), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 191 [2022-01-31 18:35:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:35:13,260 INFO L225 Difference]: With dead ends: 1033 [2022-01-31 18:35:13,260 INFO L226 Difference]: Without dead ends: 979 [2022-01-31 18:35:13,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9585, Invalid=17147, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 18:35:13,262 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3724 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 2044 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3724 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2044 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:35:13,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3724 Valid, 35 Invalid, 3381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2044 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:35:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-01-31 18:35:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 215. [2022-01-31 18:35:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 202 states have (on average 1.0594059405940595) internal successors, (214), 204 states have internal predecessors, (214), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:35:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 227 transitions. [2022-01-31 18:35:13,576 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 227 transitions. Word has length 191 [2022-01-31 18:35:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:35:13,576 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 227 transitions. [2022-01-31 18:35:13,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.231707317073171) internal successors, (183), 80 states have internal predecessors, (183), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:35:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 227 transitions. [2022-01-31 18:35:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 18:35:13,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:35:13,577 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:13,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:35:13,577 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:35:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:35:13,577 INFO L85 PathProgramCache]: Analyzing trace with hash 582457904, now seen corresponding path program 77 times [2022-01-31 18:35:13,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:35:13,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166914298] [2022-01-31 18:35:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:35:13,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:35:13,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:35:13,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:35:13,589 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:35:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:15,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:35:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:15,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-01-31 18:35:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:15,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-01-31 18:35:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:15,636 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 18:35:15,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:35:15,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166914298] [2022-01-31 18:35:15,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [166914298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:35:15,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:35:15,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:35:15,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178063495] [2022-01-31 18:35:15,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:35:15,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:35:15,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:35:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:35:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3167, Invalid=3639, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:35:15,639 INFO L87 Difference]: Start difference. First operand 215 states and 227 transitions. Second operand has 83 states, 83 states have (on average 2.2289156626506026) internal successors, (185), 81 states have internal predecessors, (185), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:35:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:35:39,735 INFO L93 Difference]: Finished difference Result 1045 states and 1300 transitions. [2022-01-31 18:35:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:35:39,735 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.2289156626506026) internal successors, (185), 81 states have internal predecessors, (185), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 193 [2022-01-31 18:35:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:35:39,737 INFO L225 Difference]: With dead ends: 1045 [2022-01-31 18:35:39,737 INFO L226 Difference]: Without dead ends: 991 [2022-01-31 18:35:39,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9826, Invalid=17564, Unknown=0, NotChecked=0, Total=27390 [2022-01-31 18:35:39,739 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3426 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 1902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1902 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:35:39,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3426 Valid, 39 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1902 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:35:39,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-01-31 18:35:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 217. [2022-01-31 18:35:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 204 states have (on average 1.0588235294117647) internal successors, (216), 206 states have internal predecessors, (216), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:35:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 229 transitions. [2022-01-31 18:35:40,061 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 229 transitions. Word has length 193 [2022-01-31 18:35:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:35:40,061 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 229 transitions. [2022-01-31 18:35:40,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.2289156626506026) internal successors, (185), 81 states have internal predecessors, (185), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:35:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 229 transitions. [2022-01-31 18:35:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 18:35:40,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:35:40,062 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:40,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:35:40,062 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:35:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:35:40,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1511375534, now seen corresponding path program 78 times [2022-01-31 18:35:40,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:35:40,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705459865] [2022-01-31 18:35:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:35:40,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:35:40,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:35:40,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:35:40,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:35:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:42,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:35:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:42,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-01-31 18:35:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:42,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-01-31 18:35:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:42,158 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 18:35:42,159 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:35:42,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705459865] [2022-01-31 18:35:42,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [705459865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:35:42,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:35:42,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:35:42,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010279897] [2022-01-31 18:35:42,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:35:42,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:35:42,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:35:42,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:35:42,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3247, Invalid=3725, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:35:42,161 INFO L87 Difference]: Start difference. First operand 217 states and 229 transitions. Second operand has 84 states, 84 states have (on average 2.2261904761904763) internal successors, (187), 82 states have internal predecessors, (187), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:36:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:07,301 INFO L93 Difference]: Finished difference Result 1057 states and 1315 transitions. [2022-01-31 18:36:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:36:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.2261904761904763) internal successors, (187), 82 states have internal predecessors, (187), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 195 [2022-01-31 18:36:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:07,303 INFO L225 Difference]: With dead ends: 1057 [2022-01-31 18:36:07,303 INFO L226 Difference]: Without dead ends: 1003 [2022-01-31 18:36:07,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10070, Invalid=17986, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 18:36:07,305 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3248 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 1812 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3248 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1812 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:07,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3248 Valid, 37 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1812 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:36:07,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-01-31 18:36:07,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 219. [2022-01-31 18:36:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 206 states have (on average 1.058252427184466) internal successors, (218), 208 states have internal predecessors, (218), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:36:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 231 transitions. [2022-01-31 18:36:07,630 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 231 transitions. Word has length 195 [2022-01-31 18:36:07,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:07,630 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 231 transitions. [2022-01-31 18:36:07,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.2261904761904763) internal successors, (187), 82 states have internal predecessors, (187), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:36:07,630 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 231 transitions. [2022-01-31 18:36:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 18:36:07,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:07,631 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:07,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:36:07,631 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:07,631 INFO L85 PathProgramCache]: Analyzing trace with hash 848020396, now seen corresponding path program 79 times [2022-01-31 18:36:07,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:07,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773692133] [2022-01-31 18:36:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:07,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:07,633 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:07,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:07,642 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:09,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:09,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-01-31 18:36:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:09,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-01-31 18:36:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:36:09,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:09,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773692133] [2022-01-31 18:36:09,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [773692133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:09,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:09,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:36:09,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768943984] [2022-01-31 18:36:09,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:09,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:36:09,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:09,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:36:09,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3328, Invalid=3812, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:36:09,743 INFO L87 Difference]: Start difference. First operand 219 states and 231 transitions. Second operand has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 83 states have internal predecessors, (189), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:36:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:36:35,284 INFO L93 Difference]: Finished difference Result 1069 states and 1330 transitions. [2022-01-31 18:36:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:36:35,285 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 83 states have internal predecessors, (189), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 197 [2022-01-31 18:36:35,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:36:35,287 INFO L225 Difference]: With dead ends: 1069 [2022-01-31 18:36:35,287 INFO L226 Difference]: Without dead ends: 1015 [2022-01-31 18:36:35,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=10317, Invalid=18413, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 18:36:35,291 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 1759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3142 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1759 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:36:35,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3142 Valid, 39 Invalid, 3333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1759 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:36:35,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-01-31 18:36:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 221. [2022-01-31 18:36:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 208 states have (on average 1.0576923076923077) internal successors, (220), 210 states have internal predecessors, (220), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:36:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 233 transitions. [2022-01-31 18:36:35,645 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 233 transitions. Word has length 197 [2022-01-31 18:36:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:36:35,646 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 233 transitions. [2022-01-31 18:36:35,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 83 states have internal predecessors, (189), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:36:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 233 transitions. [2022-01-31 18:36:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 18:36:35,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:36:35,646 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:35,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:36:35,647 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:36:35,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:36:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash -981107414, now seen corresponding path program 80 times [2022-01-31 18:36:35,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:36:35,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690091578] [2022-01-31 18:36:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:36:35,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:36:35,648 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:36:35,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:36:35,659 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:36:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:37,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:36:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:37,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-01-31 18:36:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:37,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-01-31 18:36:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:36:37,809 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 18:36:37,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:36:37,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690091578] [2022-01-31 18:36:37,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [690091578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:36:37,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:36:37,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:36:37,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893715082] [2022-01-31 18:36:37,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:36:37,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:36:37,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:36:37,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:36:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3410, Invalid=3900, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:36:37,820 INFO L87 Difference]: Start difference. First operand 221 states and 233 transitions. Second operand has 86 states, 86 states have (on average 2.2209302325581395) internal successors, (191), 84 states have internal predecessors, (191), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:37:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:03,959 INFO L93 Difference]: Finished difference Result 1081 states and 1345 transitions. [2022-01-31 18:37:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:37:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2209302325581395) internal successors, (191), 84 states have internal predecessors, (191), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 199 [2022-01-31 18:37:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:03,961 INFO L225 Difference]: With dead ends: 1081 [2022-01-31 18:37:03,961 INFO L226 Difference]: Without dead ends: 1027 [2022-01-31 18:37:03,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=10567, Invalid=18845, Unknown=0, NotChecked=0, Total=29412 [2022-01-31 18:37:03,962 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3110 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 1744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3110 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1744 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:03,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3110 Valid, 39 Invalid, 3348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1744 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:37:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-01-31 18:37:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 223. [2022-01-31 18:37:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 210 states have (on average 1.0571428571428572) internal successors, (222), 212 states have internal predecessors, (222), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:37:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 235 transitions. [2022-01-31 18:37:04,322 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 235 transitions. Word has length 199 [2022-01-31 18:37:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:04,322 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 235 transitions. [2022-01-31 18:37:04,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2209302325581395) internal successors, (191), 84 states have internal predecessors, (191), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:37:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 235 transitions. [2022-01-31 18:37:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 18:37:04,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:04,323 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:37:04,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:37:04,323 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:04,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2131308760, now seen corresponding path program 81 times [2022-01-31 18:37:04,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:04,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005564728] [2022-01-31 18:37:04,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:04,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:04,325 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:04,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:04,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:06,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:06,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-01-31 18:37:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:06,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-01-31 18:37:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:06,544 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 18:37:06,544 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:06,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005564728] [2022-01-31 18:37:06,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1005564728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:06,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:06,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:37:06,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582443028] [2022-01-31 18:37:06,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:06,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:37:06,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:06,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:37:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3493, Invalid=3989, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:37:06,547 INFO L87 Difference]: Start difference. First operand 223 states and 235 transitions. Second operand has 87 states, 87 states have (on average 2.218390804597701) internal successors, (193), 85 states have internal predecessors, (193), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:37:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:37:33,909 INFO L93 Difference]: Finished difference Result 1093 states and 1360 transitions. [2022-01-31 18:37:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:37:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.218390804597701) internal successors, (193), 85 states have internal predecessors, (193), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 201 [2022-01-31 18:37:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:37:33,911 INFO L225 Difference]: With dead ends: 1093 [2022-01-31 18:37:33,911 INFO L226 Difference]: Without dead ends: 1039 [2022-01-31 18:37:33,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=10820, Invalid=19282, Unknown=0, NotChecked=0, Total=30102 [2022-01-31 18:37:33,912 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3343 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 1863 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3343 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1863 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:37:33,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3343 Valid, 38 Invalid, 3431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1863 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:37:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-31 18:37:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 225. [2022-01-31 18:37:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 212 states have (on average 1.0566037735849056) internal successors, (224), 214 states have internal predecessors, (224), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:37:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 237 transitions. [2022-01-31 18:37:34,264 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 237 transitions. Word has length 201 [2022-01-31 18:37:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:37:34,264 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 237 transitions. [2022-01-31 18:37:34,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.218390804597701) internal successors, (193), 85 states have internal predecessors, (193), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:37:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 237 transitions. [2022-01-31 18:37:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 18:37:34,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:37:34,265 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:37:34,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:37:34,265 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:37:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:37:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash 626760102, now seen corresponding path program 82 times [2022-01-31 18:37:34,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:37:34,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477727031] [2022-01-31 18:37:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:37:34,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:37:34,267 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:37:34,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:37:34,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:37:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:36,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:37:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:36,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-01-31 18:37:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:36,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-01-31 18:37:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:37:36,520 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 18:37:36,521 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:37:36,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477727031] [2022-01-31 18:37:36,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477727031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:37:36,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:37:36,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:37:36,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961260692] [2022-01-31 18:37:36,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:37:36,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:37:36,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:37:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:37:36,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3577, Invalid=4079, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:37:36,524 INFO L87 Difference]: Start difference. First operand 225 states and 237 transitions. Second operand has 88 states, 88 states have (on average 2.215909090909091) internal successors, (195), 86 states have internal predecessors, (195), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:38:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:38:06,062 INFO L93 Difference]: Finished difference Result 1105 states and 1375 transitions. [2022-01-31 18:38:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:38:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.215909090909091) internal successors, (195), 86 states have internal predecessors, (195), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 203 [2022-01-31 18:38:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:38:06,064 INFO L225 Difference]: With dead ends: 1105 [2022-01-31 18:38:06,065 INFO L226 Difference]: Without dead ends: 1051 [2022-01-31 18:38:06,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=11076, Invalid=19724, Unknown=0, NotChecked=0, Total=30800 [2022-01-31 18:38:06,066 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3659 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 2030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3659 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2030 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:38:06,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3659 Valid, 40 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2030 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 18:38:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-01-31 18:38:06,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 227. [2022-01-31 18:38:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 214 states have (on average 1.0560747663551402) internal successors, (226), 216 states have internal predecessors, (226), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:38:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 239 transitions. [2022-01-31 18:38:06,463 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 239 transitions. Word has length 203 [2022-01-31 18:38:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:38:06,463 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 239 transitions. [2022-01-31 18:38:06,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.215909090909091) internal successors, (195), 86 states have internal predecessors, (195), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:38:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 239 transitions. [2022-01-31 18:38:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 18:38:06,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:38:06,464 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:38:06,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:38:06,464 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:38:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:38:06,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1136114852, now seen corresponding path program 83 times [2022-01-31 18:38:06,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:38:06,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014406317] [2022-01-31 18:38:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:38:06,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:38:06,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:38:06,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:38:06,477 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:38:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:08,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:38:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:08,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-01-31 18:38:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:08,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-01-31 18:38:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:08,794 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 18:38:08,794 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:38:08,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014406317] [2022-01-31 18:38:08,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014406317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:38:08,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:38:08,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:38:08,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953484599] [2022-01-31 18:38:08,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:38:08,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:38:08,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:38:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:38:08,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3662, Invalid=4170, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:38:08,796 INFO L87 Difference]: Start difference. First operand 227 states and 239 transitions. Second operand has 89 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 87 states have internal predecessors, (197), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:38:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:38:39,447 INFO L93 Difference]: Finished difference Result 1117 states and 1390 transitions. [2022-01-31 18:38:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:38:39,447 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 87 states have internal predecessors, (197), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 205 [2022-01-31 18:38:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:38:39,449 INFO L225 Difference]: With dead ends: 1117 [2022-01-31 18:38:39,449 INFO L226 Difference]: Without dead ends: 1063 [2022-01-31 18:38:39,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=11335, Invalid=20171, Unknown=0, NotChecked=0, Total=31506 [2022-01-31 18:38:39,451 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3471 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 1936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1936 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:38:39,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 36 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1936 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 18:38:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-01-31 18:38:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 229. [2022-01-31 18:38:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 216 states have (on average 1.0555555555555556) internal successors, (228), 218 states have internal predecessors, (228), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:38:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 241 transitions. [2022-01-31 18:38:39,849 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 241 transitions. Word has length 205 [2022-01-31 18:38:39,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:38:39,849 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 241 transitions. [2022-01-31 18:38:39,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 87 states have internal predecessors, (197), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:38:39,849 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 241 transitions. [2022-01-31 18:38:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 18:38:39,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:38:39,850 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:38:39,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:38:39,850 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:38:39,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:38:39,850 INFO L85 PathProgramCache]: Analyzing trace with hash 999757858, now seen corresponding path program 84 times [2022-01-31 18:38:39,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:38:39,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486926655] [2022-01-31 18:38:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:38:39,852 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:38:39,852 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:38:39,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:38:39,863 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:38:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:42,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:38:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:42,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-01-31 18:38:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:42,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-01-31 18:38:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:38:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:38:42,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:38:42,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486926655] [2022-01-31 18:38:42,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [486926655] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:38:42,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:38:42,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:38:42,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124748900] [2022-01-31 18:38:42,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:38:42,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:38:42,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:38:42,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:38:42,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3748, Invalid=4262, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:38:42,258 INFO L87 Difference]: Start difference. First operand 229 states and 241 transitions. Second operand has 90 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 88 states have internal predecessors, (199), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:39:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:39:13,649 INFO L93 Difference]: Finished difference Result 1129 states and 1405 transitions. [2022-01-31 18:39:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:39:13,649 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 88 states have internal predecessors, (199), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 207 [2022-01-31 18:39:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:39:13,651 INFO L225 Difference]: With dead ends: 1129 [2022-01-31 18:39:13,651 INFO L226 Difference]: Without dead ends: 1075 [2022-01-31 18:39:13,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4256 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=11597, Invalid=20623, Unknown=0, NotChecked=0, Total=32220 [2022-01-31 18:39:13,653 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 4065 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 2235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4065 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2235 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:39:13,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4065 Valid, 35 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2235 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 18:39:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-01-31 18:39:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 231. [2022-01-31 18:39:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 218 states have (on average 1.055045871559633) internal successors, (230), 220 states have internal predecessors, (230), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 18:39:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 243 transitions. [2022-01-31 18:39:14,036 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 243 transitions. Word has length 207 [2022-01-31 18:39:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:39:14,036 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 243 transitions. [2022-01-31 18:39:14,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 88 states have internal predecessors, (199), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 18:39:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 243 transitions. [2022-01-31 18:39:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 18:39:14,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:39:14,037 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:39:14,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:39:14,037 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:39:14,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:39:14,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1190294496, now seen corresponding path program 85 times [2022-01-31 18:39:14,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:39:14,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46031270] [2022-01-31 18:39:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:39:14,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:39:14,038 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:39:14,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:39:14,050 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:39:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:39:16,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:39:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:39:16,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-01-31 18:39:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:39:16,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-01-31 18:39:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:39:16,457 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 18:39:16,458 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:39:16,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46031270] [2022-01-31 18:39:16,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [46031270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:39:16,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:39:16,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:39:16,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136519003] [2022-01-31 18:39:16,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:39:16,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:39:16,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:39:16,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:39:16,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3835, Invalid=4355, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:39:16,460 INFO L87 Difference]: Start difference. First operand 231 states and 243 transitions. Second operand has 91 states, 91 states have (on average 2.208791208791209) internal successors, (201), 89 states have internal predecessors, (201), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)