/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-tiling/revcpyswp2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:58:19,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:58:19,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:58:19,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:58:19,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 18:58:19,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 18:58:19,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 18:58:19,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 18:58:19,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 18:58:19,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 18:58:19,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 18:58:19,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 18:58:19,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 18:58:19,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 18:58:19,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 18:58:19,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 18:58:19,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 18:58:19,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:58:19,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:58:19,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:58:19,399 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 18:58:19,408 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:58:19,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:58:19,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:58:19,409 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:58:19,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:58:19,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:58:19,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:58:19,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:58:19,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:58:19,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:58:19,410 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:58:19,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:58:19,410 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:58:19,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:58:19,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:58:19,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:58:19,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:58:19,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:58:19,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:58:19,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:58:19,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:58:19,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:58:19,411 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:58:19,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:58:19,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:58:19,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:58:19,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:58:19,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:58:19,602 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:58:19,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c [2022-01-31 18:58:19,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c1713bde/f676cf23edff43c790827955e34e7b89/FLAGd4d5c2340 [2022-01-31 18:58:19,989 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:58:19,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/revcpyswp2.c [2022-01-31 18:58:19,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c1713bde/f676cf23edff43c790827955e34e7b89/FLAGd4d5c2340 [2022-01-31 18:58:20,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c1713bde/f676cf23edff43c790827955e34e7b89 [2022-01-31 18:58:20,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:58:20,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:58:20,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:58:20,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:58:20,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:58:20,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:58:20" (1/1) ... [2022-01-31 18:58:20,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2500566b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20, skipping insertion in model container [2022-01-31 18:58:20,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:58:20" (1/1) ... [2022-01-31 18:58:20,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:58:20,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:58:20,542 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-tiling/revcpyswp2.c[432,445] [2022-01-31 18:58:20,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:58:20,560 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:58:20,567 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-tiling/revcpyswp2.c[432,445] [2022-01-31 18:58:20,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:58:20,580 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:58:20,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20 WrapperNode [2022-01-31 18:58:20,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:58:20,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:58:20,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:58:20,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:58:20,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20" (1/1) ... [2022-01-31 18:58:20,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20" (1/1) ... [2022-01-31 18:58:20,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20" (1/1) ... [2022-01-31 18:58:20,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20" (1/1) ... [2022-01-31 18:58:20,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20" (1/1) ... [2022-01-31 18:58:20,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20" (1/1) ... [2022-01-31 18:58:20,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20" (1/1) ... [2022-01-31 18:58:20,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:58:20,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:58:20,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:58:20,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:58:20,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20" (1/1) ... [2022-01-31 18:58:20,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:58:20,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:58:20,637 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 18:58:20,644 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 18:58:20,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:58:20,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:58:20,674 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:58:20,674 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 18:58:20,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 18:58:20,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:58:20,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:58:20,675 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:58:20,675 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:58:20,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:58:20,675 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 18:58:20,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 18:58:20,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 18:58:20,676 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 18:58:20,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:58:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 18:58:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:58:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:58:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:58:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:58:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:58:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:58:20,758 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:58:20,759 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:58:20,907 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:58:20,911 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:58:20,911 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 18:58:20,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:58:20 BoogieIcfgContainer [2022-01-31 18:58:20,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:58:20,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:58:20,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:58:20,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:58:20,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:58:20" (1/3) ... [2022-01-31 18:58:20,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63aadcc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:58:20, skipping insertion in model container [2022-01-31 18:58:20,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:58:20" (2/3) ... [2022-01-31 18:58:20,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63aadcc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:58:20, skipping insertion in model container [2022-01-31 18:58:20,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:58:20" (3/3) ... [2022-01-31 18:58:20,926 INFO L111 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2022-01-31 18:58:20,929 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:58:20,930 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:58:20,956 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:58:20,960 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 18:58:20,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:58:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 27 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:58:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 18:58:20,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:20,982 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 18:58:20,982 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1562750912, now seen corresponding path program 1 times [2022-01-31 18:58:21,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:21,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229417550] [2022-01-31 18:58:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:21,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:21,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:21,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:58:21,239 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:21,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229417550] [2022-01-31 18:58:21,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229417550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:21,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:21,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:58:21,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136482161] [2022-01-31 18:58:21,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:21,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 18:58:21,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:21,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 18:58:21,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:58:21,269 INFO L87 Difference]: Start difference. First operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 27 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:58:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:21,364 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2022-01-31 18:58:21,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 18:58:21,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 18:58:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:21,370 INFO L225 Difference]: With dead ends: 61 [2022-01-31 18:58:21,370 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 18:58:21,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:58:21,379 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:21,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:58:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 18:58:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-31 18:58:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 18:58:21,405 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2022-01-31 18:58:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:21,405 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 18:58:21,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:58:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 18:58:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 18:58:21,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:21,407 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] [2022-01-31 18:58:21,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:58:21,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:21,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1882541358, now seen corresponding path program 1 times [2022-01-31 18:58:21,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:21,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311470144] [2022-01-31 18:58:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:21,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:21,426 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:21,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:21,428 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:21,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:21,505 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 18:58:21,506 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:21,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311470144] [2022-01-31 18:58:21,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [311470144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:21,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:21,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:58:21,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508261004] [2022-01-31 18:58:21,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:21,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:58:21,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:58:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:58:21,508 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 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 18:58:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:21,601 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-01-31 18:58:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:58:21,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 18:58:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:21,605 INFO L225 Difference]: With dead ends: 58 [2022-01-31 18:58:21,605 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 18:58:21,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:58:21,607 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:21,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:58:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 18:58:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-01-31 18:58:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 18:58:21,615 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2022-01-31 18:58:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:21,615 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 18:58:21,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 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 18:58:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 18:58:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 18:58:21,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:21,616 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] [2022-01-31 18:58:21,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:58:21,616 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash 163198508, now seen corresponding path program 1 times [2022-01-31 18:58:21,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:21,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661284396] [2022-01-31 18:58:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:21,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:21,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:21,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:21,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:21,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:21,711 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 18:58:21,712 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661284396] [2022-01-31 18:58:21,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1661284396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:21,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:21,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:58:21,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347158883] [2022-01-31 18:58:21,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:21,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:58:21,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:58:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:58:21,714 INFO L87 Difference]: Start difference. First operand 33 states and 37 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, (3), 3 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 18:58:21,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:21,778 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-01-31 18:58:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:58:21,778 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 18:58:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:21,781 INFO L225 Difference]: With dead ends: 58 [2022-01-31 18:58:21,781 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 18:58:21,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:58:21,787 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:21,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 33 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:58:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 18:58:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 18:58:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 18:58:21,803 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2022-01-31 18:58:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:21,804 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 18:58:21,804 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, (3), 3 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 18:58:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 18:58:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 18:58:21,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:21,807 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] [2022-01-31 18:58:21,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:58:21,807 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:21,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:21,807 INFO L85 PathProgramCache]: Analyzing trace with hash 10205386, now seen corresponding path program 2 times [2022-01-31 18:58:21,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:21,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204318343] [2022-01-31 18:58:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:21,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:21,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:21,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:21,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:21,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:21,904 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 18:58:21,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:21,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204318343] [2022-01-31 18:58:21,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [204318343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:21,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:21,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:58:21,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958087711] [2022-01-31 18:58:21,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:21,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:58:21,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:21,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:58:21,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:58:21,906 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 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 18:58:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:22,005 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-01-31 18:58:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:58:22,006 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 18:58:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:22,007 INFO L225 Difference]: With dead ends: 65 [2022-01-31 18:58:22,007 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 18:58:22,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:58:22,015 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:22,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 29 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:58:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 18:58:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-01-31 18:58:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-01-31 18:58:22,031 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 30 [2022-01-31 18:58:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:22,031 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-01-31 18:58:22,031 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), 2 states have call successors, (3), 3 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 18:58:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-01-31 18:58:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 18:58:22,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:22,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:22,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:58:22,032 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:22,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:22,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1523015132, now seen corresponding path program 3 times [2022-01-31 18:58:22,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:22,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600319557] [2022-01-31 18:58:22,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:22,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:22,036 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:22,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:22,038 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:23,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:23,032 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 18:58:23,032 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:23,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600319557] [2022-01-31 18:58:23,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [600319557] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:23,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:23,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:58:23,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221178086] [2022-01-31 18:58:23,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:23,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:58:23,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:58:23,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:58:23,034 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:58:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:23,539 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2022-01-31 18:58:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:58:23,542 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 18:58:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:23,543 INFO L225 Difference]: With dead ends: 114 [2022-01-31 18:58:23,543 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 18:58:23,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:58:23,544 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:23,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 145 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:58:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 18:58:23,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 72. [2022-01-31 18:58:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.171875) internal successors, (75), 65 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:58:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-01-31 18:58:23,555 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 36 [2022-01-31 18:58:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:23,556 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-01-31 18:58:23,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:58:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-01-31 18:58:23,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 18:58:23,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:23,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:23,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:58:23,557 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:23,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1840555714, now seen corresponding path program 4 times [2022-01-31 18:58:23,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:23,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939422089] [2022-01-31 18:58:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:23,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:23,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:23,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:23,560 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:23,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:23,625 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 18:58:23,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:23,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939422089] [2022-01-31 18:58:23,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [939422089] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:23,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:23,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 18:58:23,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726525539] [2022-01-31 18:58:23,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:23,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 18:58:23,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:23,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 18:58:23,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:58:23,626 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:58:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:23,900 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2022-01-31 18:58:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:58:23,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 18:58:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:23,902 INFO L225 Difference]: With dead ends: 159 [2022-01-31 18:58:23,902 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 18:58:23,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:58:23,903 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 60 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:23,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 87 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:58:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 18:58:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2022-01-31 18:58:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 85 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:58:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-01-31 18:58:23,917 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 38 [2022-01-31 18:58:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:23,917 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-01-31 18:58:23,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:58:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-01-31 18:58:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 18:58:23,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:23,918 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:23,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:58:23,918 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1765447072, now seen corresponding path program 5 times [2022-01-31 18:58:23,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:23,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772381450] [2022-01-31 18:58:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:23,923 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:23,923 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:23,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:23,925 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:24,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:24,014 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 18:58:24,014 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:24,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772381450] [2022-01-31 18:58:24,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772381450] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:24,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:24,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 18:58:24,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598038774] [2022-01-31 18:58:24,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:24,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 18:58:24,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:24,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 18:58:24,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:58:24,016 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:58:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:24,230 INFO L93 Difference]: Finished difference Result 149 states and 165 transitions. [2022-01-31 18:58:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 18:58:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 18:58:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:24,231 INFO L225 Difference]: With dead ends: 149 [2022-01-31 18:58:24,231 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 18:58:24,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:58:24,232 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:24,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 60 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:58:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 18:58:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2022-01-31 18:58:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 71 states have internal predecessors, (77), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:58:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-01-31 18:58:24,247 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 40 [2022-01-31 18:58:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:24,248 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-01-31 18:58:24,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (3), 3 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 18:58:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-01-31 18:58:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 18:58:24,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:24,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:24,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:58:24,253 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash 212657499, now seen corresponding path program 1 times [2022-01-31 18:58:24,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:24,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238816693] [2022-01-31 18:58:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:24,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:24,257 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:24,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:24,259 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:25,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 18:58:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:25,147 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 18:58:25,147 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:25,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238816693] [2022-01-31 18:58:25,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238816693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:25,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:25,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:58:25,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352068037] [2022-01-31 18:58:25,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:25,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:58:25,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:58:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:58:25,149 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:25,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:25,501 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2022-01-31 18:58:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 18:58:25,502 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-01-31 18:58:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:25,502 INFO L225 Difference]: With dead ends: 83 [2022-01-31 18:58:25,502 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 18:58:25,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:58:25,503 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:25,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 123 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:58:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 18:58:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 18:58:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-31 18:58:25,509 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 44 [2022-01-31 18:58:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:25,509 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-31 18:58:25,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-31 18:58:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 18:58:25,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:25,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:25,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:58:25,510 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:25,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1032386076, now seen corresponding path program 6 times [2022-01-31 18:58:25,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:25,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326365937] [2022-01-31 18:58:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:25,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:25,512 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:25,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:25,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:26,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:26,569 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 18:58:26,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326365937] [2022-01-31 18:58:26,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326365937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:26,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:26,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 18:58:26,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860664494] [2022-01-31 18:58:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:26,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 18:58:26,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:26,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 18:58:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:58:26,571 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:58:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:27,329 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-01-31 18:58:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:58:27,330 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 18:58:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:27,330 INFO L225 Difference]: With dead ends: 63 [2022-01-31 18:58:27,330 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 18:58:27,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=1837, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:58:27,333 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:27,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 144 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:58:27,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 18:58:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2022-01-31 18:58:27,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 48 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:58:27,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-31 18:58:27,345 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 44 [2022-01-31 18:58:27,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:27,345 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-31 18:58:27,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:58:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-31 18:58:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 18:58:27,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:27,346 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:27,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:58:27,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:27,347 INFO L85 PathProgramCache]: Analyzing trace with hash 658882899, now seen corresponding path program 2 times [2022-01-31 18:58:27,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:27,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720400643] [2022-01-31 18:58:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:27,348 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:27,348 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:27,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:27,350 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:28,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:29,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 18:58:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:29,009 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 18:58:29,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720400643] [2022-01-31 18:58:29,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [720400643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:29,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:29,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:58:29,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673562868] [2022-01-31 18:58:29,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:29,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:58:29,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:29,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:58:29,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:58:29,011 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:31,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:31,228 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-01-31 18:58:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:58:31,228 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-01-31 18:58:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:31,229 INFO L225 Difference]: With dead ends: 100 [2022-01-31 18:58:31,229 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 18:58:31,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=577, Invalid=3083, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:58:31,230 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 159 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:31,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 176 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:58:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 18:58:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2022-01-31 18:58:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 75 states have internal predecessors, (81), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 18:58:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2022-01-31 18:58:31,253 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 52 [2022-01-31 18:58:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:31,253 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2022-01-31 18:58:31,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2022-01-31 18:58:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 18:58:31,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:31,254 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:31,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:58:31,255 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash 49187185, now seen corresponding path program 3 times [2022-01-31 18:58:31,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:31,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531585740] [2022-01-31 18:58:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:31,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:31,257 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:31,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:31,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:31,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:31,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 18:58:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:31,329 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 18:58:31,329 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:31,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531585740] [2022-01-31 18:58:31,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [531585740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:31,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:31,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:58:31,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468215253] [2022-01-31 18:58:31,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:31,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:58:31,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:31,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:58:31,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:58:31,331 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:31,573 INFO L93 Difference]: Finished difference Result 196 states and 218 transitions. [2022-01-31 18:58:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:58:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-01-31 18:58:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:31,574 INFO L225 Difference]: With dead ends: 196 [2022-01-31 18:58:31,574 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 18:58:31,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:58:31,575 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 107 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:31,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 71 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:58:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 18:58:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 125. [2022-01-31 18:58:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 109 states have (on average 1.091743119266055) internal successors, (119), 112 states have internal predecessors, (119), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 18:58:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2022-01-31 18:58:31,599 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 54 [2022-01-31 18:58:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:31,599 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2022-01-31 18:58:31,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2022-01-31 18:58:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 18:58:31,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:31,600 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:31,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:58:31,600 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1119691471, now seen corresponding path program 4 times [2022-01-31 18:58:31,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:31,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622556523] [2022-01-31 18:58:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:31,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:31,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:31,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:31,603 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:31,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:31,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 18:58:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:31,692 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 18:58:31,692 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:31,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622556523] [2022-01-31 18:58:31,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1622556523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:31,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:31,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:58:31,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210307312] [2022-01-31 18:58:31,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:31,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:58:31,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:31,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:58:31,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:58:31,694 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:32,070 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2022-01-31 18:58:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 18:58:32,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-01-31 18:58:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:32,071 INFO L225 Difference]: With dead ends: 179 [2022-01-31 18:58:32,071 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 18:58:32,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:58:32,073 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 78 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:32,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 134 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:58:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 18:58:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2022-01-31 18:58:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 95 states have (on average 1.063157894736842) internal successors, (101), 96 states have internal predecessors, (101), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 18:58:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2022-01-31 18:58:32,105 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 56 [2022-01-31 18:58:32,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:32,106 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2022-01-31 18:58:32,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2022-01-31 18:58:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 18:58:32,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:32,106 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:32,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:58:32,106 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:32,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:32,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1279564406, now seen corresponding path program 5 times [2022-01-31 18:58:32,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:32,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432867599] [2022-01-31 18:58:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:32,109 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:32,109 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:32,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:32,110 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:33,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:33,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 18:58:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:33,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 18:58:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:33,682 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 18:58:33,682 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:33,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432867599] [2022-01-31 18:58:33,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [432867599] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:33,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:33,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:58:33,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310267850] [2022-01-31 18:58:33,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:33,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:58:33,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:33,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:58:33,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:58:33,684 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:58:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:35,093 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-01-31 18:58:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:58:35,093 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2022-01-31 18:58:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:35,094 INFO L225 Difference]: With dead ends: 117 [2022-01-31 18:58:35,094 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 18:58:35,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=2320, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:58:35,095 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 137 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:35,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 156 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:58:35,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 18:58:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2022-01-31 18:58:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:58:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-01-31 18:58:35,107 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 60 [2022-01-31 18:58:35,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:35,107 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-01-31 18:58:35,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:58:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-01-31 18:58:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 18:58:35,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:35,108 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:35,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:58:35,108 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1227916619, now seen corresponding path program 6 times [2022-01-31 18:58:35,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:35,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405576008] [2022-01-31 18:58:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:35,110 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:35,110 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:35,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:35,111 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:36,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:36,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 18:58:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:36,720 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 18:58:36,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:36,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405576008] [2022-01-31 18:58:36,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [405576008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:36,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:36,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 18:58:36,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982999197] [2022-01-31 18:58:36,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:36,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 18:58:36,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 18:58:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:58:36,721 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 37 states, 36 states have (on average 1.5) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:38,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:38,889 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-01-31 18:58:38,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 18:58:38,890 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-01-31 18:58:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:38,890 INFO L225 Difference]: With dead ends: 110 [2022-01-31 18:58:38,890 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 18:58:38,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=708, Invalid=4262, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:58:38,892 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 192 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:38,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 181 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:58:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 18:58:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2022-01-31 18:58:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 77 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 18:58:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-01-31 18:58:38,914 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 60 [2022-01-31 18:58:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:38,915 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-01-31 18:58:38,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-01-31 18:58:38,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 18:58:38,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:38,915 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:38,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:58:38,916 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:38,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1901666153, now seen corresponding path program 7 times [2022-01-31 18:58:38,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:38,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384334059] [2022-01-31 18:58:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:38,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:38,917 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:38,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:38,919 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:39,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 18:58:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:39,014 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 18:58:39,014 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:39,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384334059] [2022-01-31 18:58:39,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384334059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:39,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:39,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:58:39,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391394485] [2022-01-31 18:58:39,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:39,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:58:39,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:39,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:58:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:58:39,015 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:39,347 INFO L93 Difference]: Finished difference Result 224 states and 248 transitions. [2022-01-31 18:58:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:58:39,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-01-31 18:58:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:39,348 INFO L225 Difference]: With dead ends: 224 [2022-01-31 18:58:39,348 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 18:58:39,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:58:39,349 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 126 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:39,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 91 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:58:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 18:58:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2022-01-31 18:58:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 118 states have (on average 1.0847457627118644) internal successors, (128), 121 states have internal predecessors, (128), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 18:58:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2022-01-31 18:58:39,388 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 62 [2022-01-31 18:58:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:39,388 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2022-01-31 18:58:39,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2022-01-31 18:58:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 18:58:39,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:39,389 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:39,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:58:39,389 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:39,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1360869915, now seen corresponding path program 8 times [2022-01-31 18:58:39,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:39,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578794383] [2022-01-31 18:58:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:39,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:39,390 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:39,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:39,392 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:39,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:39,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 18:58:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:39,499 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 18:58:39,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578794383] [2022-01-31 18:58:39,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578794383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:39,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:39,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:58:39,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884877794] [2022-01-31 18:58:39,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:39,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:58:39,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:58:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:58:39,500 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:39,970 INFO L93 Difference]: Finished difference Result 201 states and 214 transitions. [2022-01-31 18:58:39,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:58:39,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-01-31 18:58:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:39,971 INFO L225 Difference]: With dead ends: 201 [2022-01-31 18:58:39,971 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 18:58:39,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:58:39,972 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:39,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 148 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:58:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 18:58:40,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 128. [2022-01-31 18:58:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 115 states have internal predecessors, (120), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 18:58:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2022-01-31 18:58:40,013 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 66 [2022-01-31 18:58:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:40,013 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2022-01-31 18:58:40,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2022-01-31 18:58:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 18:58:40,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:40,014 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:40,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:58:40,014 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:40,014 INFO L85 PathProgramCache]: Analyzing trace with hash 243184002, now seen corresponding path program 9 times [2022-01-31 18:58:40,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:40,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397413164] [2022-01-31 18:58:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:40,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:40,016 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:40,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:40,018 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:41,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:41,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 18:58:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:41,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 18:58:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:41,860 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 18:58:41,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:41,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397413164] [2022-01-31 18:58:41,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [397413164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:41,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:41,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 18:58:41,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213894346] [2022-01-31 18:58:41,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:41,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 18:58:41,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:41,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 18:58:41,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:58:41,862 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:58:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:43,405 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2022-01-31 18:58:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:58:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-01-31 18:58:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:43,406 INFO L225 Difference]: With dead ends: 152 [2022-01-31 18:58:43,406 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 18:58:43,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=545, Invalid=3615, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:58:43,407 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:43,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 213 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:58:43,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 18:58:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2022-01-31 18:58:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 124 states have (on average 1.0483870967741935) internal successors, (130), 125 states have internal predecessors, (130), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 18:58:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2022-01-31 18:58:43,453 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 68 [2022-01-31 18:58:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:43,453 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2022-01-31 18:58:43,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:58:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2022-01-31 18:58:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 18:58:43,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:43,454 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:43,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:58:43,454 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:43,454 INFO L85 PathProgramCache]: Analyzing trace with hash -480956093, now seen corresponding path program 10 times [2022-01-31 18:58:43,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:43,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447476870] [2022-01-31 18:58:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:43,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:43,456 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:43,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:43,457 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:46,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:46,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 18:58:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:46,158 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 18:58:46,158 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:46,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447476870] [2022-01-31 18:58:46,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447476870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:46,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:46,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 18:58:46,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207795875] [2022-01-31 18:58:46,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:46,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 18:58:46,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 18:58:46,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:58:46,159 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand has 40 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:48,903 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2022-01-31 18:58:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:58:48,908 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-01-31 18:58:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:48,911 INFO L225 Difference]: With dead ends: 203 [2022-01-31 18:58:48,911 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 18:58:48,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=943, Invalid=5219, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:58:48,912 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 195 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:48,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 319 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:58:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 18:58:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 179. [2022-01-31 18:58:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 158 states have (on average 1.0569620253164558) internal successors, (167), 160 states have internal predecessors, (167), 12 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 18:58:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 189 transitions. [2022-01-31 18:58:48,976 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 189 transitions. Word has length 68 [2022-01-31 18:58:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:48,977 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 189 transitions. [2022-01-31 18:58:48,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 38 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 189 transitions. [2022-01-31 18:58:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 18:58:48,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:48,977 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:48,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:58:48,977 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:48,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1398301343, now seen corresponding path program 11 times [2022-01-31 18:58:48,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:48,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042295876] [2022-01-31 18:58:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:48,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:48,981 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:48,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:48,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:49,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:49,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 18:58:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:49,085 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 18:58:49,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:49,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042295876] [2022-01-31 18:58:49,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042295876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:49,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:49,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:58:49,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836188142] [2022-01-31 18:58:49,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:49,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:58:49,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:49,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:58:49,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:58:49,086 INFO L87 Difference]: Start difference. First operand 179 states and 189 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:49,553 INFO L93 Difference]: Finished difference Result 331 states and 357 transitions. [2022-01-31 18:58:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:58:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-01-31 18:58:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:49,555 INFO L225 Difference]: With dead ends: 331 [2022-01-31 18:58:49,555 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 18:58:49,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:58:49,556 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 296 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:49,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 82 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:58:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 18:58:49,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 240. [2022-01-31 18:58:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 211 states have (on average 1.052132701421801) internal successors, (222), 214 states have internal predecessors, (222), 17 states have call successors, (17), 13 states have call predecessors, (17), 11 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 18:58:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 253 transitions. [2022-01-31 18:58:49,657 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 253 transitions. Word has length 70 [2022-01-31 18:58:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:49,657 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 253 transitions. [2022-01-31 18:58:49,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 253 transitions. [2022-01-31 18:58:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 18:58:49,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:49,658 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:49,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:58:49,658 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:49,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:49,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1838679361, now seen corresponding path program 12 times [2022-01-31 18:58:49,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:49,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747832551] [2022-01-31 18:58:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:49,659 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:49,659 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:49,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:49,661 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:49,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:49,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 18:58:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:49,773 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 18:58:49,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:49,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747832551] [2022-01-31 18:58:49,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [747832551] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:49,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:49,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:58:49,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365321016] [2022-01-31 18:58:49,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:49,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:58:49,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:58:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:58:49,774 INFO L87 Difference]: Start difference. First operand 240 states and 253 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:50,342 INFO L93 Difference]: Finished difference Result 314 states and 328 transitions. [2022-01-31 18:58:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:58:50,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-01-31 18:58:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:50,344 INFO L225 Difference]: With dead ends: 314 [2022-01-31 18:58:50,344 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 18:58:50,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:58:50,345 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 130 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:50,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 177 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:58:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 18:58:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 221. [2022-01-31 18:58:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 194 states have (on average 1.041237113402062) internal successors, (202), 196 states have internal predecessors, (202), 15 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 18:58:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 229 transitions. [2022-01-31 18:58:50,443 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 229 transitions. Word has length 72 [2022-01-31 18:58:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:50,443 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 229 transitions. [2022-01-31 18:58:50,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:58:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 229 transitions. [2022-01-31 18:58:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 18:58:50,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:50,444 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:50,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:58:50,444 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1133819577, now seen corresponding path program 13 times [2022-01-31 18:58:50,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:50,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94936373] [2022-01-31 18:58:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:50,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:50,446 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:50,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:50,447 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:52,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:52,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 18:58:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:52,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 18:58:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:52,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 18:58:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:58:52,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:52,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94936373] [2022-01-31 18:58:52,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [94936373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:52,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:52,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 18:58:52,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498793136] [2022-01-31 18:58:52,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:52,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 18:58:52,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:52,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 18:58:52,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:58:52,032 INFO L87 Difference]: Start difference. First operand 221 states and 229 transitions. Second operand has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:58:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:58:53,365 INFO L93 Difference]: Finished difference Result 223 states and 230 transitions. [2022-01-31 18:58:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:58:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 76 [2022-01-31 18:58:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:58:53,367 INFO L225 Difference]: With dead ends: 223 [2022-01-31 18:58:53,367 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 18:58:53,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=425, Invalid=2767, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:58:53,368 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 96 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:58:53,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 232 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:58:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 18:58:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-01-31 18:58:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 144 states have internal predecessors, (149), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 18:58:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 169 transitions. [2022-01-31 18:58:53,431 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 169 transitions. Word has length 76 [2022-01-31 18:58:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:58:53,431 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 169 transitions. [2022-01-31 18:58:53,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:58:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 169 transitions. [2022-01-31 18:58:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 18:58:53,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:58:53,432 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:58:53,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:58:53,432 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:58:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:58:53,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1889256763, now seen corresponding path program 14 times [2022-01-31 18:58:53,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:58:53,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909214545] [2022-01-31 18:58:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:58:53,434 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:58:53,434 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:58:53,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:58:53,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:58:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:56,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:58:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:56,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 18:58:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:58:56,436 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 18:58:56,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:58:56,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909214545] [2022-01-31 18:58:56,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [909214545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:58:56,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:58:56,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:58:56,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529169146] [2022-01-31 18:58:56,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:58:56,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:58:56,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:58:56,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:58:56,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:58:56,438 INFO L87 Difference]: Start difference. First operand 162 states and 169 transitions. Second operand has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:00,288 INFO L93 Difference]: Finished difference Result 235 states and 252 transitions. [2022-01-31 18:59:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 18:59:00,288 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-01-31 18:59:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:00,303 INFO L225 Difference]: With dead ends: 235 [2022-01-31 18:59:00,303 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 18:59:00,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1227, Invalid=6605, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:59:00,307 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 233 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:00,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 428 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:59:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 18:59:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 203. [2022-01-31 18:59:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 180 states have (on average 1.0555555555555556) internal successors, (190), 183 states have internal predecessors, (190), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 18:59:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 214 transitions. [2022-01-31 18:59:00,394 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 214 transitions. Word has length 76 [2022-01-31 18:59:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:00,394 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 214 transitions. [2022-01-31 18:59:00,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 214 transitions. [2022-01-31 18:59:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 18:59:00,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:00,395 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:00,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:59:00,395 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:00,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1153565529, now seen corresponding path program 15 times [2022-01-31 18:59:00,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:00,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327355115] [2022-01-31 18:59:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:00,397 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:00,397 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:00,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:00,399 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:00,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:00,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 18:59:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:00,546 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 18:59:00,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327355115] [2022-01-31 18:59:00,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327355115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:00,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:00,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:59:00,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039959824] [2022-01-31 18:59:00,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:00,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:59:00,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:00,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:59:00,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:59:00,547 INFO L87 Difference]: Start difference. First operand 203 states and 214 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:01,153 INFO L93 Difference]: Finished difference Result 371 states and 400 transitions. [2022-01-31 18:59:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:59:01,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-01-31 18:59:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:01,154 INFO L225 Difference]: With dead ends: 371 [2022-01-31 18:59:01,154 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 18:59:01,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:59:01,155 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 333 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:01,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 100 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:59:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 18:59:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 272. [2022-01-31 18:59:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 240 states have (on average 1.05) internal successors, (252), 244 states have internal predecessors, (252), 19 states have call successors, (19), 13 states have call predecessors, (19), 12 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 18:59:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 287 transitions. [2022-01-31 18:59:01,295 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 287 transitions. Word has length 78 [2022-01-31 18:59:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:01,296 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 287 transitions. [2022-01-31 18:59:01,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 287 transitions. [2022-01-31 18:59:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 18:59:01,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:01,297 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:01,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:59:01,297 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:01,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1042267465, now seen corresponding path program 16 times [2022-01-31 18:59:01,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:01,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206741344] [2022-01-31 18:59:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:01,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:01,298 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:01,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:01,300 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:01,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:01,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 18:59:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:01,442 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 18:59:01,442 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:01,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206741344] [2022-01-31 18:59:01,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1206741344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:01,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:01,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:59:01,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626513489] [2022-01-31 18:59:01,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:01,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:59:01,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:59:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:59:01,443 INFO L87 Difference]: Start difference. First operand 272 states and 287 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:02,162 INFO L93 Difference]: Finished difference Result 358 states and 376 transitions. [2022-01-31 18:59:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:59:02,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 80 [2022-01-31 18:59:02,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:02,163 INFO L225 Difference]: With dead ends: 358 [2022-01-31 18:59:02,163 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 18:59:02,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:59:02,164 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 162 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:02,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 176 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:59:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 18:59:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 251. [2022-01-31 18:59:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 221 states have (on average 1.0407239819004526) internal successors, (230), 224 states have internal predecessors, (230), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 18:59:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 261 transitions. [2022-01-31 18:59:02,282 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 261 transitions. Word has length 80 [2022-01-31 18:59:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:02,282 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 261 transitions. [2022-01-31 18:59:02,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 261 transitions. [2022-01-31 18:59:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 18:59:02,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:02,283 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:02,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:59:02,283 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:02,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1315802447, now seen corresponding path program 17 times [2022-01-31 18:59:02,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:02,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769933629] [2022-01-31 18:59:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:02,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:02,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:02,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:02,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:04,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:04,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 18:59:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:04,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 18:59:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:04,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 18:59:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:04,412 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 18:59:04,412 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:04,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769933629] [2022-01-31 18:59:04,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [769933629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:04,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:04,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 18:59:04,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735115675] [2022-01-31 18:59:04,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:04,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 18:59:04,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 18:59:04,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:59:04,414 INFO L87 Difference]: Start difference. First operand 251 states and 261 transitions. Second operand has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:59:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:06,134 INFO L93 Difference]: Finished difference Result 272 states and 282 transitions. [2022-01-31 18:59:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 18:59:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 84 [2022-01-31 18:59:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:06,135 INFO L225 Difference]: With dead ends: 272 [2022-01-31 18:59:06,136 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 18:59:06,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=612, Invalid=4080, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:59:06,137 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 173 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:06,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 224 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:59:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 18:59:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 265. [2022-01-31 18:59:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 232 states have (on average 1.0344827586206897) internal successors, (240), 234 states have internal predecessors, (240), 18 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 18:59:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 273 transitions. [2022-01-31 18:59:06,269 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 273 transitions. Word has length 84 [2022-01-31 18:59:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:06,269 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 273 transitions. [2022-01-31 18:59:06,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:59:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 273 transitions. [2022-01-31 18:59:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 18:59:06,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:06,270 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:06,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:59:06,270 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:06,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1978417459, now seen corresponding path program 18 times [2022-01-31 18:59:06,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:06,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570055972] [2022-01-31 18:59:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:06,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:06,272 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:06,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:06,275 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:09,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:09,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 18:59:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:59:09,810 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:09,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570055972] [2022-01-31 18:59:09,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [570055972] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:09,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:09,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 18:59:09,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325885007] [2022-01-31 18:59:09,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:09,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 18:59:09,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 18:59:09,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2368, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:59:09,818 INFO L87 Difference]: Start difference. First operand 265 states and 273 transitions. Second operand has 52 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 50 states have internal predecessors, (78), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:14,149 INFO L93 Difference]: Finished difference Result 346 states and 365 transitions. [2022-01-31 18:59:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 18:59:14,150 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 50 states have internal predecessors, (78), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 84 [2022-01-31 18:59:14,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:14,151 INFO L225 Difference]: With dead ends: 346 [2022-01-31 18:59:14,152 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 18:59:14,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2643 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1475, Invalid=8425, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:59:14,153 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 302 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 3026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:14,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 472 Invalid, 3026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:59:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 18:59:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 310. [2022-01-31 18:59:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 274 states have (on average 1.0401459854014599) internal successors, (285), 277 states have internal predecessors, (285), 20 states have call successors, (20), 17 states have call predecessors, (20), 15 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 18:59:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 322 transitions. [2022-01-31 18:59:14,300 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 322 transitions. Word has length 84 [2022-01-31 18:59:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:14,301 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 322 transitions. [2022-01-31 18:59:14,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 50 states have internal predecessors, (78), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 322 transitions. [2022-01-31 18:59:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 18:59:14,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:14,302 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:14,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:59:14,302 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:14,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1819258543, now seen corresponding path program 19 times [2022-01-31 18:59:14,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:14,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029134475] [2022-01-31 18:59:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:14,303 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:14,303 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:14,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:14,311 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:14,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:14,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 18:59:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:14,472 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 18:59:14,472 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:14,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029134475] [2022-01-31 18:59:14,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1029134475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:14,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:14,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:59:14,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453957416] [2022-01-31 18:59:14,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:14,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:59:14,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:14,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:59:14,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:59:14,474 INFO L87 Difference]: Start difference. First operand 310 states and 322 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:15,355 INFO L93 Difference]: Finished difference Result 502 states and 532 transitions. [2022-01-31 18:59:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 18:59:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 86 [2022-01-31 18:59:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:15,358 INFO L225 Difference]: With dead ends: 502 [2022-01-31 18:59:15,358 INFO L226 Difference]: Without dead ends: 415 [2022-01-31 18:59:15,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:59:15,359 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 649 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:15,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 95 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:59:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-31 18:59:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 391. [2022-01-31 18:59:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 344 states have (on average 1.0377906976744187) internal successors, (357), 348 states have internal predecessors, (357), 27 states have call successors, (27), 21 states have call predecessors, (27), 19 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 18:59:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 407 transitions. [2022-01-31 18:59:15,572 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 407 transitions. Word has length 86 [2022-01-31 18:59:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:15,572 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 407 transitions. [2022-01-31 18:59:15,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 407 transitions. [2022-01-31 18:59:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 18:59:15,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:15,573 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:15,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:59:15,573 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash 586838703, now seen corresponding path program 20 times [2022-01-31 18:59:15,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:15,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897949318] [2022-01-31 18:59:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:15,575 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:15,575 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:15,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:15,577 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:15,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:15,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 18:59:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:15,732 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 18:59:15,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897949318] [2022-01-31 18:59:15,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [897949318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:15,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:15,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:59:15,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056683986] [2022-01-31 18:59:15,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:15,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:59:15,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:59:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:59:15,733 INFO L87 Difference]: Start difference. First operand 391 states and 407 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:16,658 INFO L93 Difference]: Finished difference Result 489 states and 508 transitions. [2022-01-31 18:59:16,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:59:16,658 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 88 [2022-01-31 18:59:16,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:16,659 INFO L225 Difference]: With dead ends: 489 [2022-01-31 18:59:16,659 INFO L226 Difference]: Without dead ends: 385 [2022-01-31 18:59:16,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:59:16,660 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 165 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:16,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 229 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:59:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-31 18:59:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 368. [2022-01-31 18:59:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 323 states have (on average 1.0309597523219813) internal successors, (333), 326 states have internal predecessors, (333), 25 states have call successors, (25), 21 states have call predecessors, (25), 19 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 18:59:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 379 transitions. [2022-01-31 18:59:16,864 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 379 transitions. Word has length 88 [2022-01-31 18:59:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:16,864 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 379 transitions. [2022-01-31 18:59:16,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 379 transitions. [2022-01-31 18:59:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 18:59:16,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:16,865 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:16,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:59:16,865 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash -202909464, now seen corresponding path program 21 times [2022-01-31 18:59:16,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:16,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937683070] [2022-01-31 18:59:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:16,867 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:16,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:16,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:16,869 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:19,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:19,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 18:59:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 18:59:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:19,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 18:59:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:19,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 18:59:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:19,513 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 18:59:19,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:19,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937683070] [2022-01-31 18:59:19,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937683070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:19,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:19,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 18:59:19,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719581321] [2022-01-31 18:59:19,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:19,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 18:59:19,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:19,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 18:59:19,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:59:19,515 INFO L87 Difference]: Start difference. First operand 368 states and 379 transitions. Second operand has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 18:59:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:21,886 INFO L93 Difference]: Finished difference Result 377 states and 388 transitions. [2022-01-31 18:59:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 18:59:21,886 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 92 [2022-01-31 18:59:21,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:21,887 INFO L225 Difference]: With dead ends: 377 [2022-01-31 18:59:21,887 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 18:59:21,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=752, Invalid=4504, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:59:21,888 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 198 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:21,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 215 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:59:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 18:59:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2022-01-31 18:59:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 259 states have (on average 1.0347490347490347) internal successors, (268), 262 states have internal predecessors, (268), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 18:59:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 305 transitions. [2022-01-31 18:59:22,063 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 305 transitions. Word has length 92 [2022-01-31 18:59:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:22,064 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 305 transitions. [2022-01-31 18:59:22,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 18:59:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 305 transitions. [2022-01-31 18:59:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 18:59:22,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:22,064 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:22,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:59:22,065 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:22,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2110872277, now seen corresponding path program 22 times [2022-01-31 18:59:22,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:22,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408000530] [2022-01-31 18:59:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:22,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:22,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:22,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:22,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:26,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:26,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 18:59:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:26,150 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 18:59:26,150 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:26,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408000530] [2022-01-31 18:59:26,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [408000530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:26,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:26,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 18:59:26,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722102185] [2022-01-31 18:59:26,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:26,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 18:59:26,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:26,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 18:59:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2848, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:59:26,152 INFO L87 Difference]: Start difference. First operand 295 states and 305 transitions. Second operand has 57 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 55 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:31,637 INFO L93 Difference]: Finished difference Result 388 states and 411 transitions. [2022-01-31 18:59:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:59:31,637 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 55 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 92 [2022-01-31 18:59:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:31,638 INFO L225 Difference]: With dead ends: 388 [2022-01-31 18:59:31,638 INFO L226 Difference]: Without dead ends: 386 [2022-01-31 18:59:31,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2089, Invalid=11717, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:59:31,640 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 342 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:31,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 492 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:59:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-31 18:59:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 344. [2022-01-31 18:59:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 305 states have (on average 1.039344262295082) internal successors, (317), 309 states have internal predecessors, (317), 22 states have call successors, (22), 17 states have call predecessors, (22), 16 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 18:59:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 358 transitions. [2022-01-31 18:59:31,853 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 358 transitions. Word has length 92 [2022-01-31 18:59:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:31,853 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 358 transitions. [2022-01-31 18:59:31,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 55 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 358 transitions. [2022-01-31 18:59:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 18:59:31,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:31,854 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:31,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:59:31,854 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1124432055, now seen corresponding path program 23 times [2022-01-31 18:59:31,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:31,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851553892] [2022-01-31 18:59:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:31,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:31,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:31,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:31,859 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:32,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:32,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 18:59:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:32,031 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 18:59:32,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:32,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851553892] [2022-01-31 18:59:32,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1851553892] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:32,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:32,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:59:32,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978437833] [2022-01-31 18:59:32,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:32,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:59:32,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:59:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:59:32,033 INFO L87 Difference]: Start difference. First operand 344 states and 358 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:33,079 INFO L93 Difference]: Finished difference Result 552 states and 586 transitions. [2022-01-31 18:59:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:59:33,079 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2022-01-31 18:59:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:33,080 INFO L225 Difference]: With dead ends: 552 [2022-01-31 18:59:33,080 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 18:59:33,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=1602, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:59:33,081 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 478 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:33,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 140 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:59:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 18:59:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 433. [2022-01-31 18:59:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 382 states have (on average 1.036649214659686) internal successors, (396), 387 states have internal predecessors, (396), 30 states have call successors, (30), 21 states have call predecessors, (30), 20 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 18:59:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 452 transitions. [2022-01-31 18:59:33,355 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 452 transitions. Word has length 94 [2022-01-31 18:59:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:33,355 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 452 transitions. [2022-01-31 18:59:33,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 452 transitions. [2022-01-31 18:59:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 18:59:33,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:33,356 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:33,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:59:33,356 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:33,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1818326361, now seen corresponding path program 24 times [2022-01-31 18:59:33,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:33,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8281081] [2022-01-31 18:59:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:33,358 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:33,358 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:33,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:33,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:33,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:33,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 18:59:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:33,560 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 18:59:33,560 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8281081] [2022-01-31 18:59:33,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [8281081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:33,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:33,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:59:33,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703946360] [2022-01-31 18:59:33,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:33,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:59:33,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:33,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:59:33,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:59:33,561 INFO L87 Difference]: Start difference. First operand 433 states and 452 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:34,663 INFO L93 Difference]: Finished difference Result 543 states and 567 transitions. [2022-01-31 18:59:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 18:59:34,664 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 96 [2022-01-31 18:59:34,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:34,665 INFO L225 Difference]: With dead ends: 543 [2022-01-31 18:59:34,665 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 18:59:34,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=336, Invalid=1304, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:59:34,666 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 191 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:34,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 292 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:59:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 18:59:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 408. [2022-01-31 18:59:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 359 states have (on average 1.0306406685236769) internal successors, (370), 363 states have internal predecessors, (370), 28 states have call successors, (28), 21 states have call predecessors, (28), 20 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 18:59:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 422 transitions. [2022-01-31 18:59:34,930 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 422 transitions. Word has length 96 [2022-01-31 18:59:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:34,930 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 422 transitions. [2022-01-31 18:59:34,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 422 transitions. [2022-01-31 18:59:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 18:59:34,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:34,931 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:34,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:59:34,931 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1513096416, now seen corresponding path program 25 times [2022-01-31 18:59:34,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:34,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104888687] [2022-01-31 18:59:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:34,932 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:34,933 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:34,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:34,935 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:37,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:37,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 18:59:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:37,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 18:59:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:37,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 18:59:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:37,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 18:59:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:38,000 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 18:59:38,000 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:38,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104888687] [2022-01-31 18:59:38,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104888687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:38,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:38,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 18:59:38,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171510506] [2022-01-31 18:59:38,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:38,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 18:59:38,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 18:59:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:59:38,002 INFO L87 Difference]: Start difference. First operand 408 states and 422 transitions. Second operand has 48 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 46 states have internal predecessors, (79), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 18:59:41,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:41,858 INFO L93 Difference]: Finished difference Result 421 states and 435 transitions. [2022-01-31 18:59:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 18:59:41,858 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 46 states have internal predecessors, (79), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 100 [2022-01-31 18:59:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:41,861 INFO L225 Difference]: With dead ends: 421 [2022-01-31 18:59:41,861 INFO L226 Difference]: Without dead ends: 417 [2022-01-31 18:59:41,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1097, Invalid=7275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:59:41,862 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 287 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:41,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 278 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:59:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-31 18:59:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 410. [2022-01-31 18:59:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 361 states have (on average 1.0277008310249307) internal successors, (371), 364 states have internal predecessors, (371), 28 states have call successors, (28), 22 states have call predecessors, (28), 20 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 18:59:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 423 transitions. [2022-01-31 18:59:42,141 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 423 transitions. Word has length 100 [2022-01-31 18:59:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:42,142 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 423 transitions. [2022-01-31 18:59:42,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 46 states have internal predecessors, (79), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 18:59:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 423 transitions. [2022-01-31 18:59:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 18:59:42,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:42,143 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:42,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:59:42,143 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:42,143 INFO L85 PathProgramCache]: Analyzing trace with hash 776663331, now seen corresponding path program 26 times [2022-01-31 18:59:42,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:42,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238694215] [2022-01-31 18:59:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:42,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:42,144 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:42,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:42,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:47,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:47,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 18:59:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:47,020 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 18:59:47,020 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:47,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238694215] [2022-01-31 18:59:47,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [238694215] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:47,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:47,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 18:59:47,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105548890] [2022-01-31 18:59:47,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:47,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 18:59:47,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 18:59:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=3346, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:59:47,021 INFO L87 Difference]: Start difference. First operand 410 states and 423 transitions. Second operand has 62 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:53,166 INFO L93 Difference]: Finished difference Result 519 states and 548 transitions. [2022-01-31 18:59:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:59:53,167 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 100 [2022-01-31 18:59:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:53,168 INFO L225 Difference]: With dead ends: 519 [2022-01-31 18:59:53,168 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 18:59:53,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3986 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2195, Invalid=12085, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:59:53,169 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 323 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 2721 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 2721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:53,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 525 Invalid, 3524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [803 Valid, 2721 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:59:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 18:59:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 463. [2022-01-31 18:59:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 411 states have (on average 1.0316301703163018) internal successors, (424), 415 states have internal predecessors, (424), 30 states have call successors, (30), 23 states have call predecessors, (30), 21 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 18:59:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 480 transitions. [2022-01-31 18:59:53,482 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 480 transitions. Word has length 100 [2022-01-31 18:59:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:53,483 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 480 transitions. [2022-01-31 18:59:53,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.540983606557377) internal successors, (94), 60 states have internal predecessors, (94), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 480 transitions. [2022-01-31 18:59:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 18:59:53,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:53,484 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:53,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:59:53,484 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1360485055, now seen corresponding path program 27 times [2022-01-31 18:59:53,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:53,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749639502] [2022-01-31 18:59:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:53,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:53,486 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:53,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:53,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:53,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:53,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 18:59:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:53,693 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 18:59:53,693 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:53,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749639502] [2022-01-31 18:59:53,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [749639502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:53,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:53,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:59:53,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400019599] [2022-01-31 18:59:53,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:53,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:59:53,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:53,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:59:53,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:59:53,694 INFO L87 Difference]: Start difference. First operand 463 states and 480 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:55,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:59:55,126 INFO L93 Difference]: Finished difference Result 687 states and 726 transitions. [2022-01-31 18:59:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 18:59:55,126 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 102 [2022-01-31 18:59:55,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:59:55,128 INFO L225 Difference]: With dead ends: 687 [2022-01-31 18:59:55,128 INFO L226 Difference]: Without dead ends: 592 [2022-01-31 18:59:55,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=737, Invalid=2569, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:59:55,128 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1064 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:59:55,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1075 Valid, 100 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:59:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-31 18:59:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 560. [2022-01-31 18:59:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 495 states have (on average 1.0303030303030303) internal successors, (510), 500 states have internal predecessors, (510), 39 states have call successors, (39), 27 states have call predecessors, (39), 25 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 18:59:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 583 transitions. [2022-01-31 18:59:55,572 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 583 transitions. Word has length 102 [2022-01-31 18:59:55,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:59:55,573 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 583 transitions. [2022-01-31 18:59:55,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:59:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 583 transitions. [2022-01-31 18:59:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 18:59:55,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:59:55,574 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:59:55,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:59:55,574 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:59:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:59:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash -278672361, now seen corresponding path program 28 times [2022-01-31 18:59:55,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:59:55,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878642737] [2022-01-31 18:59:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:59:55,575 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:59:55,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:59:55,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:59:55,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:59:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:58,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:59:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:58,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 18:59:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:58,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 18:59:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:58,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 18:59:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:58,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 18:59:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:58,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 18:59:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:59:58,312 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 18:59:58,313 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:59:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878642737] [2022-01-31 18:59:58,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [878642737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:59:58,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:59:58,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:59:58,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446899015] [2022-01-31 18:59:58,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:59:58,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:59:58,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:59:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:59:58,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:59:58,314 INFO L87 Difference]: Start difference. First operand 560 states and 583 transitions. Second operand has 47 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:00:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:00:01,969 INFO L93 Difference]: Finished difference Result 569 states and 592 transitions. [2022-01-31 19:00:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:00:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 108 [2022-01-31 19:00:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:00:01,971 INFO L225 Difference]: With dead ends: 569 [2022-01-31 19:00:01,971 INFO L226 Difference]: Without dead ends: 480 [2022-01-31 19:00:01,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=959, Invalid=6523, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:00:01,972 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 270 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:00:01,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 311 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:00:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-31 19:00:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 473. [2022-01-31 19:00:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 419 states have (on average 1.0334128878281623) internal successors, (433), 424 states have internal predecessors, (433), 33 states have call successors, (33), 21 states have call predecessors, (33), 20 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-31 19:00:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 495 transitions. [2022-01-31 19:00:02,351 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 495 transitions. Word has length 108 [2022-01-31 19:00:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:00:02,351 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 495 transitions. [2022-01-31 19:00:02,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:00:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 495 transitions. [2022-01-31 19:00:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 19:00:02,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:00:02,352 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:00:02,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:00:02,352 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:00:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:00:02,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1145795937, now seen corresponding path program 29 times [2022-01-31 19:00:02,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:00:02,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271782371] [2022-01-31 19:00:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:00:02,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:00:02,354 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:00:02,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:00:02,357 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:00:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:02,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:00:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:02,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:00:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:00:02,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:00:02,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271782371] [2022-01-31 19:00:02,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [271782371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:00:02,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:00:02,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:00:02,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436482513] [2022-01-31 19:00:02,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:00:02,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:00:02,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:00:02,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:00:02,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:00:02,575 INFO L87 Difference]: Start difference. First operand 473 states and 495 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:00:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:00:03,858 INFO L93 Difference]: Finished difference Result 595 states and 624 transitions. [2022-01-31 19:00:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:00:03,858 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 104 [2022-01-31 19:00:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:00:03,860 INFO L225 Difference]: With dead ends: 595 [2022-01-31 19:00:03,860 INFO L226 Difference]: Without dead ends: 471 [2022-01-31 19:00:03,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=1574, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:00:03,861 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 206 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1707 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:00:03,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 288 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1707 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:00:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-31 19:00:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 446. [2022-01-31 19:00:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 394 states have (on average 1.0279187817258884) internal successors, (405), 398 states have internal predecessors, (405), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 19:00:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 463 transitions. [2022-01-31 19:00:04,209 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 463 transitions. Word has length 104 [2022-01-31 19:00:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:00:04,209 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 463 transitions. [2022-01-31 19:00:04,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:00:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 463 transitions. [2022-01-31 19:00:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 19:00:04,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:00:04,210 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:00:04,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:00:04,210 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:00:04,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:00:04,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1286989608, now seen corresponding path program 30 times [2022-01-31 19:00:04,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:00:04,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112614575] [2022-01-31 19:00:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:00:04,212 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:00:04,212 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:00:04,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:00:04,215 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:00:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:07,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:00:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:07,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:00:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:07,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:00:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:07,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:00:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:07,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:00:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:07,794 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 19:00:07,794 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:00:07,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112614575] [2022-01-31 19:00:07,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112614575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:00:07,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:00:07,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 19:00:07,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279864686] [2022-01-31 19:00:07,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:00:07,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 19:00:07,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:00:07,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 19:00:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2507, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:00:07,795 INFO L87 Difference]: Start difference. First operand 446 states and 463 transitions. Second operand has 53 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 51 states have internal predecessors, (87), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 19:00:12,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:00:12,395 INFO L93 Difference]: Finished difference Result 463 states and 481 transitions. [2022-01-31 19:00:12,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:00:12,396 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 51 states have internal predecessors, (87), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 108 [2022-01-31 19:00:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:00:12,397 INFO L225 Difference]: With dead ends: 463 [2022-01-31 19:00:12,397 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 19:00:12,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1325, Invalid=9387, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 19:00:12,398 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 293 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:00:12,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 355 Invalid, 3161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 2433 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:00:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 19:00:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 450. [2022-01-31 19:00:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 397 states have (on average 1.0277078085642317) internal successors, (408), 401 states have internal predecessors, (408), 31 states have call successors, (31), 22 states have call predecessors, (31), 21 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 19:00:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 466 transitions. [2022-01-31 19:00:12,760 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 466 transitions. Word has length 108 [2022-01-31 19:00:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:00:12,760 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 466 transitions. [2022-01-31 19:00:12,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 51 states have internal predecessors, (87), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 19:00:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 466 transitions. [2022-01-31 19:00:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 19:00:12,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:00:12,761 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:00:12,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:00:12,762 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:00:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:00:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash 489235739, now seen corresponding path program 31 times [2022-01-31 19:00:12,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:00:12,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760732852] [2022-01-31 19:00:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:00:12,763 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:00:12,763 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:00:12,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:00:12,766 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:00:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:18,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:00:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:18,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:00:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:00:18,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:00:18,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760732852] [2022-01-31 19:00:18,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760732852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:00:18,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:00:18,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 19:00:18,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667657570] [2022-01-31 19:00:18,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:00:18,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 19:00:18,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:00:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 19:00:18,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=3937, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:00:18,846 INFO L87 Difference]: Start difference. First operand 450 states and 466 transitions. Second operand has 67 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 65 states have internal predecessors, (102), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:00:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:00:26,663 INFO L93 Difference]: Finished difference Result 567 states and 600 transitions. [2022-01-31 19:00:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 19:00:26,664 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 65 states have internal predecessors, (102), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 108 [2022-01-31 19:00:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:00:26,665 INFO L225 Difference]: With dead ends: 567 [2022-01-31 19:00:26,665 INFO L226 Difference]: Without dead ends: 565 [2022-01-31 19:00:26,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5684 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3004, Invalid=16456, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 19:00:26,666 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 388 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 3590 mSolverCounterSat, 896 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 4486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 896 IncrementalHoareTripleChecker+Valid, 3590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:00:26,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 617 Invalid, 4486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [896 Valid, 3590 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 19:00:26,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-31 19:00:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 507. [2022-01-31 19:00:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 451 states have (on average 1.0310421286031042) internal successors, (465), 456 states have internal predecessors, (465), 33 states have call successors, (33), 23 states have call predecessors, (33), 22 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-31 19:00:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 527 transitions. [2022-01-31 19:00:27,081 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 527 transitions. Word has length 108 [2022-01-31 19:00:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:00:27,081 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 527 transitions. [2022-01-31 19:00:27,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 65 states have internal predecessors, (102), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:00:27,081 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 527 transitions. [2022-01-31 19:00:27,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 19:00:27,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:00:27,082 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:00:27,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:00:27,082 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:00:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:00:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 558017337, now seen corresponding path program 32 times [2022-01-31 19:00:27,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:00:27,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436274018] [2022-01-31 19:00:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:00:27,084 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:00:27,084 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:00:27,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:00:27,087 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:00:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:27,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:00:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:27,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:00:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:27,327 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 19:00:27,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:00:27,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436274018] [2022-01-31 19:00:27,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [436274018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:00:27,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:00:27,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:00:27,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713973107] [2022-01-31 19:00:27,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:00:27,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:00:27,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:00:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:00:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:00:27,328 INFO L87 Difference]: Start difference. First operand 507 states and 527 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:00:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:00:29,120 INFO L93 Difference]: Finished difference Result 747 states and 791 transitions. [2022-01-31 19:00:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:00:29,122 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 110 [2022-01-31 19:00:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:00:29,124 INFO L225 Difference]: With dead ends: 747 [2022-01-31 19:00:29,125 INFO L226 Difference]: Without dead ends: 648 [2022-01-31 19:00:29,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=872, Invalid=3160, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:00:29,125 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1223 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 1314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1314 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:00:29,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 109 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1314 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:00:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-31 19:00:29,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 612. [2022-01-31 19:00:29,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 542 states have (on average 1.029520295202952) internal successors, (558), 548 states have internal predecessors, (558), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 19:00:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 639 transitions. [2022-01-31 19:00:29,680 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 639 transitions. Word has length 110 [2022-01-31 19:00:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:00:29,680 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 639 transitions. [2022-01-31 19:00:29,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:00:29,680 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 639 transitions. [2022-01-31 19:00:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 19:00:29,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:00:29,681 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:00:29,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:00:29,681 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:00:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:00:29,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1158047759, now seen corresponding path program 33 times [2022-01-31 19:00:29,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:00:29,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660103954] [2022-01-31 19:00:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:00:29,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:00:29,691 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:00:29,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:00:29,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:00:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:32,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:00:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:32,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:00:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:32,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:00:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:32,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:00:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:32,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:00:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:32,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:00:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:32,841 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 19:00:32,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:00:32,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660103954] [2022-01-31 19:00:32,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1660103954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:00:32,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:00:32,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 19:00:32,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354157268] [2022-01-31 19:00:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:00:32,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 19:00:32,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:00:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 19:00:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2502, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:00:32,842 INFO L87 Difference]: Start difference. First operand 612 states and 639 transitions. Second operand has 53 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 51 states have internal predecessors, (90), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:00:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:00:37,462 INFO L93 Difference]: Finished difference Result 629 states and 657 transitions. [2022-01-31 19:00:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 19:00:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 51 states have internal predecessors, (90), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 116 [2022-01-31 19:00:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:00:37,465 INFO L225 Difference]: With dead ends: 629 [2022-01-31 19:00:37,465 INFO L226 Difference]: Without dead ends: 625 [2022-01-31 19:00:37,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1241, Invalid=8659, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 19:00:37,466 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 295 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:00:37,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 362 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:00:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-31 19:00:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 614. [2022-01-31 19:00:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 544 states have (on average 1.0275735294117647) internal successors, (559), 549 states have internal predecessors, (559), 43 states have call successors, (43), 28 states have call predecessors, (43), 26 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 19:00:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 640 transitions. [2022-01-31 19:00:38,145 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 640 transitions. Word has length 116 [2022-01-31 19:00:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:00:38,146 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 640 transitions. [2022-01-31 19:00:38,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 51 states have internal predecessors, (90), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:00:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 640 transitions. [2022-01-31 19:00:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 19:00:38,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:00:38,160 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:00:38,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:00:38,160 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:00:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:00:38,160 INFO L85 PathProgramCache]: Analyzing trace with hash 220492439, now seen corresponding path program 34 times [2022-01-31 19:00:38,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:00:38,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027439499] [2022-01-31 19:00:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:00:38,162 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:00:38,162 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:00:38,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:00:38,169 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:00:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:38,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:00:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:38,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:00:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:00:38,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:00:38,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027439499] [2022-01-31 19:00:38,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027439499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:00:38,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:00:38,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:00:38,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256602358] [2022-01-31 19:00:38,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:00:38,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:00:38,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:00:38,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:00:38,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:00:38,409 INFO L87 Difference]: Start difference. First operand 614 states and 640 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:00:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:00:40,229 INFO L93 Difference]: Finished difference Result 748 states and 783 transitions. [2022-01-31 19:00:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:00:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 112 [2022-01-31 19:00:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:00:40,231 INFO L225 Difference]: With dead ends: 748 [2022-01-31 19:00:40,231 INFO L226 Difference]: Without dead ends: 614 [2022-01-31 19:00:40,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:00:40,240 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 230 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 2223 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 2223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:00:40,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 286 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 2223 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:00:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-31 19:00:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 585. [2022-01-31 19:00:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 517 states have (on average 1.02321083172147) internal successors, (529), 521 states have internal predecessors, (529), 41 states have call successors, (41), 28 states have call predecessors, (41), 26 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 19:00:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 606 transitions. [2022-01-31 19:00:40,786 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 606 transitions. Word has length 112 [2022-01-31 19:00:40,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:00:40,786 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 606 transitions. [2022-01-31 19:00:40,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:00:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 606 transitions. [2022-01-31 19:00:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 19:00:40,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:00:40,787 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:00:40,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:00:40,787 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:00:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:00:40,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1444811984, now seen corresponding path program 35 times [2022-01-31 19:00:40,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:00:40,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43627053] [2022-01-31 19:00:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:00:40,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:00:40,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:00:40,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:00:40,793 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:00:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:44,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:00:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:44,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:00:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:44,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:00:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:44,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:00:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:44,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:00:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:44,996 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 19:00:44,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:00:44,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43627053] [2022-01-31 19:00:44,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [43627053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:00:44,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:00:44,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 19:00:44,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238282496] [2022-01-31 19:00:44,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:00:44,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 19:00:44,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:00:44,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 19:00:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2672, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:00:44,998 INFO L87 Difference]: Start difference. First operand 585 states and 606 transitions. Second operand has 55 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 53 states have internal predecessors, (95), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 19:00:50,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:00:50,455 INFO L93 Difference]: Finished difference Result 606 states and 629 transitions. [2022-01-31 19:00:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 19:00:50,456 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 53 states have internal predecessors, (95), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 116 [2022-01-31 19:00:50,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:00:50,457 INFO L225 Difference]: With dead ends: 606 [2022-01-31 19:00:50,457 INFO L226 Difference]: Without dead ends: 604 [2022-01-31 19:00:50,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1577, Invalid=10195, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 19:00:50,458 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 427 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 3368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:00:50,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 522 Invalid, 3368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 19:00:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-31 19:00:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 589. [2022-01-31 19:00:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 520 states have (on average 1.023076923076923) internal successors, (532), 524 states have internal predecessors, (532), 41 states have call successors, (41), 29 states have call predecessors, (41), 27 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 19:00:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 609 transitions. [2022-01-31 19:00:51,026 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 609 transitions. Word has length 116 [2022-01-31 19:00:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:00:51,027 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 609 transitions. [2022-01-31 19:00:51,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 53 states have internal predecessors, (95), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 19:00:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 609 transitions. [2022-01-31 19:00:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 19:00:51,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:00:51,028 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:00:51,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:00:51,028 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:00:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:00:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash -72269549, now seen corresponding path program 36 times [2022-01-31 19:00:51,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:00:51,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904897657] [2022-01-31 19:00:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:00:51,030 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:00:51,030 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:00:51,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:00:51,034 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:00:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:56,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:00:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:56,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:00:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:00:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:00:56,520 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:00:56,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904897657] [2022-01-31 19:00:56,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [904897657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:00:56,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:00:56,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 19:00:56,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832220088] [2022-01-31 19:00:56,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:00:56,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 19:00:56,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:00:56,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 19:00:56,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=3659, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:00:56,521 INFO L87 Difference]: Start difference. First operand 589 states and 609 transitions. Second operand has 65 states, 64 states have (on average 1.71875) internal successors, (110), 63 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:01:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:01:08,287 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2022-01-31 19:01:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 19:01:08,287 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.71875) internal successors, (110), 63 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 116 [2022-01-31 19:01:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:01:08,289 INFO L225 Difference]: With dead ends: 622 [2022-01-31 19:01:08,289 INFO L226 Difference]: Without dead ends: 620 [2022-01-31 19:01:08,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12518 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=4151, Invalid=35649, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 19:01:08,291 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 257 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 6860 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 7746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 6860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:01:08,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 836 Invalid, 7746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 6860 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 19:01:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-01-31 19:01:08,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 593. [2022-01-31 19:01:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 523 states have (on average 1.022944550669216) internal successors, (535), 527 states have internal predecessors, (535), 41 states have call successors, (41), 30 states have call predecessors, (41), 28 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 19:01:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 612 transitions. [2022-01-31 19:01:08,895 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 612 transitions. Word has length 116 [2022-01-31 19:01:08,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:01:08,896 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 612 transitions. [2022-01-31 19:01:08,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.71875) internal successors, (110), 63 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:01:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 612 transitions. [2022-01-31 19:01:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 19:01:08,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:01:08,897 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:01:08,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:01:08,897 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:01:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:01:08,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1404538950, now seen corresponding path program 37 times [2022-01-31 19:01:08,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:01:08,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869674179] [2022-01-31 19:01:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:01:08,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:01:08,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:01:08,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:01:08,903 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:01:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:12,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:01:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:12,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:01:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:12,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:01:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:12,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:01:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:12,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:01:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:12,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:01:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:12,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:01:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:12,353 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 19:01:12,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:01:12,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869674179] [2022-01-31 19:01:12,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869674179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:01:12,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:01:12,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 19:01:12,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32061220] [2022-01-31 19:01:12,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:01:12,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 19:01:12,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:01:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 19:01:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2409, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:01:12,354 INFO L87 Difference]: Start difference. First operand 593 states and 612 transitions. Second operand has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:01:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:01:16,690 INFO L93 Difference]: Finished difference Result 606 states and 626 transitions. [2022-01-31 19:01:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:01:16,691 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 124 [2022-01-31 19:01:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:01:16,692 INFO L225 Difference]: With dead ends: 606 [2022-01-31 19:01:16,693 INFO L226 Difference]: Without dead ends: 503 [2022-01-31 19:01:16,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1156, Invalid=8156, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:01:16,693 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 366 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 2256 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 2845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:01:16,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 382 Invalid, 2845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2256 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:01:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-31 19:01:17,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 492. [2022-01-31 19:01:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 435 states have (on average 1.025287356321839) internal successors, (446), 439 states have internal predecessors, (446), 34 states have call successors, (34), 23 states have call predecessors, (34), 22 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 19:01:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 510 transitions. [2022-01-31 19:01:17,196 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 510 transitions. Word has length 124 [2022-01-31 19:01:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:01:17,196 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 510 transitions. [2022-01-31 19:01:17,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:01:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 510 transitions. [2022-01-31 19:01:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 19:01:17,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:01:17,197 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:01:17,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:01:17,197 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:01:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:01:17,198 INFO L85 PathProgramCache]: Analyzing trace with hash 536538119, now seen corresponding path program 38 times [2022-01-31 19:01:17,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:01:17,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739941483] [2022-01-31 19:01:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:01:17,199 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:01:17,199 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:01:17,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:01:17,203 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:01:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:21,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:01:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:21,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:01:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:21,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:01:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:21,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:01:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:21,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:01:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:21,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:01:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:21,680 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 19:01:21,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:01:21,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739941483] [2022-01-31 19:01:21,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1739941483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:01:21,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:01:21,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 19:01:21,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586959200] [2022-01-31 19:01:21,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:01:21,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 19:01:21,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:01:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 19:01:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=3010, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:01:21,681 INFO L87 Difference]: Start difference. First operand 492 states and 510 transitions. Second operand has 58 states, 57 states have (on average 1.719298245614035) internal successors, (98), 56 states have internal predecessors, (98), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:01:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:01:27,524 INFO L93 Difference]: Finished difference Result 513 states and 533 transitions. [2022-01-31 19:01:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 19:01:27,525 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.719298245614035) internal successors, (98), 56 states have internal predecessors, (98), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 124 [2022-01-31 19:01:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:01:27,527 INFO L225 Difference]: With dead ends: 513 [2022-01-31 19:01:27,527 INFO L226 Difference]: Without dead ends: 511 [2022-01-31 19:01:27,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2966 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1652, Invalid=11004, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 19:01:27,528 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 444 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 3357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:01:27,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 378 Invalid, 3357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 19:01:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-31 19:01:28,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 496. [2022-01-31 19:01:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 438 states have (on average 1.0251141552511416) internal successors, (449), 442 states have internal predecessors, (449), 34 states have call successors, (34), 24 states have call predecessors, (34), 23 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 19:01:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 513 transitions. [2022-01-31 19:01:28,043 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 513 transitions. Word has length 124 [2022-01-31 19:01:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:01:28,043 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 513 transitions. [2022-01-31 19:01:28,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.719298245614035) internal successors, (98), 56 states have internal predecessors, (98), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:01:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 513 transitions. [2022-01-31 19:01:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 19:01:28,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:01:28,044 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:01:28,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:01:28,044 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:01:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:01:28,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1550583608, now seen corresponding path program 39 times [2022-01-31 19:01:28,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:01:28,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883233484] [2022-01-31 19:01:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:01:28,046 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:01:28,046 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:01:28,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:01:28,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:01:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:33,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:01:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:01:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:33,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:01:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:33,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:01:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:33,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:01:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:33,164 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 19:01:33,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:01:33,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883233484] [2022-01-31 19:01:33,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1883233484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:01:33,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:01:33,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 19:01:33,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601880290] [2022-01-31 19:01:33,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:01:33,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 19:01:33,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:01:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 19:01:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=3664, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:01:33,165 INFO L87 Difference]: Start difference. First operand 496 states and 513 transitions. Second operand has 64 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 62 states have internal predecessors, (103), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 19:01:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:01:41,141 INFO L93 Difference]: Finished difference Result 529 states and 549 transitions. [2022-01-31 19:01:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 19:01:41,142 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 62 states have internal predecessors, (103), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 124 [2022-01-31 19:01:41,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:01:41,143 INFO L225 Difference]: With dead ends: 529 [2022-01-31 19:01:41,143 INFO L226 Difference]: Without dead ends: 527 [2022-01-31 19:01:41,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6864 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1894, Invalid=21058, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 19:01:41,145 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 292 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 5059 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 5877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 5059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:01:41,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 712 Invalid, 5877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 5059 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 19:01:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-31 19:01:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 512. [2022-01-31 19:01:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 450 states have (on average 1.0244444444444445) internal successors, (461), 454 states have internal predecessors, (461), 35 states have call successors, (35), 27 states have call predecessors, (35), 26 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 19:01:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 527 transitions. [2022-01-31 19:01:41,673 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 527 transitions. Word has length 124 [2022-01-31 19:01:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:01:41,673 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 527 transitions. [2022-01-31 19:01:41,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 62 states have internal predecessors, (103), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 19:01:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 527 transitions. [2022-01-31 19:01:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 19:01:41,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:01:41,674 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:01:41,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:01:41,674 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:01:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:01:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1580950466, now seen corresponding path program 40 times [2022-01-31 19:01:41,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:01:41,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896773546] [2022-01-31 19:01:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:01:41,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:01:41,675 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:01:41,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:01:41,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:01:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:45,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:01:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:45,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:01:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:45,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:01:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:45,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:01:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:45,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:01:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:45,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:01:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:45,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:01:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:45,610 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 19:01:45,611 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:01:45,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896773546] [2022-01-31 19:01:45,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896773546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:01:45,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:01:45,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 19:01:45,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530399058] [2022-01-31 19:01:45,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:01:45,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 19:01:45,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:01:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 19:01:45,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2935, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:01:45,612 INFO L87 Difference]: Start difference. First operand 512 states and 527 transitions. Second operand has 57 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:01:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:01:50,723 INFO L93 Difference]: Finished difference Result 529 states and 545 transitions. [2022-01-31 19:01:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 19:01:50,723 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 132 [2022-01-31 19:01:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:01:50,725 INFO L225 Difference]: With dead ends: 529 [2022-01-31 19:01:50,725 INFO L226 Difference]: Without dead ends: 525 [2022-01-31 19:01:50,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1073, Invalid=10699, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 19:01:50,726 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 245 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 3673 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 4138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 3673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:01:50,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 489 Invalid, 4138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 3673 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 19:01:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-31 19:01:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 514. [2022-01-31 19:01:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 452 states have (on average 1.0221238938053097) internal successors, (462), 455 states have internal predecessors, (462), 35 states have call successors, (35), 28 states have call predecessors, (35), 26 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 19:01:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 528 transitions. [2022-01-31 19:01:51,256 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 528 transitions. Word has length 132 [2022-01-31 19:01:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:01:51,256 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 528 transitions. [2022-01-31 19:01:51,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:01:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 528 transitions. [2022-01-31 19:01:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 19:01:51,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:01:51,257 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:01:51,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:01:51,258 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:01:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:01:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2032752639, now seen corresponding path program 41 times [2022-01-31 19:01:51,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:01:51,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603627198] [2022-01-31 19:01:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:01:51,259 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:01:51,259 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:01:51,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:01:51,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:01:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:55,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:01:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:55,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:01:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:55,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:01:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:55,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:01:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:55,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:01:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:55,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:01:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:01:55,522 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 19:01:55,522 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:01:55,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603627198] [2022-01-31 19:01:55,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [603627198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:01:55,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:01:55,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 19:01:55,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784622939] [2022-01-31 19:01:55,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:01:55,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 19:01:55,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:01:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 19:01:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=3011, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:01:55,524 INFO L87 Difference]: Start difference. First operand 514 states and 528 transitions. Second operand has 59 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 57 states have internal predecessors, (106), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:02:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:02:00,850 INFO L93 Difference]: Finished difference Result 535 states and 551 transitions. [2022-01-31 19:02:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 19:02:00,850 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 57 states have internal predecessors, (106), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 132 [2022-01-31 19:02:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:02:00,851 INFO L225 Difference]: With dead ends: 535 [2022-01-31 19:02:00,852 INFO L226 Difference]: Without dead ends: 533 [2022-01-31 19:02:00,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1681, Invalid=10309, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 19:02:00,852 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 430 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 2850 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 2850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:02:00,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 557 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 2850 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 19:02:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-31 19:02:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 518. [2022-01-31 19:02:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 455 states have (on average 1.021978021978022) internal successors, (465), 458 states have internal predecessors, (465), 35 states have call successors, (35), 29 states have call predecessors, (35), 27 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 19:02:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 531 transitions. [2022-01-31 19:02:01,394 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 531 transitions. Word has length 132 [2022-01-31 19:02:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:02:01,394 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 531 transitions. [2022-01-31 19:02:01,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 57 states have internal predecessors, (106), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:02:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 531 transitions. [2022-01-31 19:02:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 19:02:01,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:02:01,395 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:02:01,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:02:01,395 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:02:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:02:01,396 INFO L85 PathProgramCache]: Analyzing trace with hash 831661429, now seen corresponding path program 42 times [2022-01-31 19:02:01,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:02:01,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035425847] [2022-01-31 19:02:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:02:01,397 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:02:01,397 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:02:01,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:02:01,401 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:02:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:05,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:02:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:05,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:02:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:05,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:02:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:05,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:02:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:05,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:02:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:05,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:02:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:05,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:02:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:05,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:02:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:02:05,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:02:05,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035425847] [2022-01-31 19:02:05,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035425847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:02:05,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:02:05,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 19:02:05,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19853741] [2022-01-31 19:02:05,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:02:05,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 19:02:05,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:02:05,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 19:02:05,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2791, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:02:05,135 INFO L87 Difference]: Start difference. First operand 518 states and 531 transitions. Second operand has 57 states, 56 states have (on average 1.8571428571428572) internal successors, (104), 55 states have internal predecessors, (104), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:02:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:02:09,428 INFO L93 Difference]: Finished difference Result 531 states and 545 transitions. [2022-01-31 19:02:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 19:02:09,430 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.8571428571428572) internal successors, (104), 55 states have internal predecessors, (104), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 140 [2022-01-31 19:02:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:02:09,431 INFO L225 Difference]: With dead ends: 531 [2022-01-31 19:02:09,431 INFO L226 Difference]: Without dead ends: 414 [2022-01-31 19:02:09,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1310, Invalid=8196, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 19:02:09,432 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 388 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:02:09,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 404 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:02:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-31 19:02:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 403. [2022-01-31 19:02:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 355 states have (on average 1.0253521126760563) internal successors, (364), 358 states have internal predecessors, (364), 27 states have call successors, (27), 21 states have call predecessors, (27), 20 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 19:02:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 415 transitions. [2022-01-31 19:02:09,869 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 415 transitions. Word has length 140 [2022-01-31 19:02:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:02:09,869 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 415 transitions. [2022-01-31 19:02:09,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.8571428571428572) internal successors, (104), 55 states have internal predecessors, (104), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:02:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 415 transitions. [2022-01-31 19:02:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 19:02:09,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:02:09,870 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:02:09,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:02:09,870 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:02:09,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:02:09,871 INFO L85 PathProgramCache]: Analyzing trace with hash 698585142, now seen corresponding path program 43 times [2022-01-31 19:02:09,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:02:09,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688564354] [2022-01-31 19:02:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:02:09,872 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:02:09,872 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:02:09,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:02:09,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:02:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:14,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:02:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:14,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:02:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:14,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:02:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:14,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:02:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:14,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:02:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:14,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:02:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:14,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:02:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:14,580 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 19:02:14,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:02:14,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688564354] [2022-01-31 19:02:14,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [688564354] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:02:14,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:02:14,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 19:02:14,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783565781] [2022-01-31 19:02:14,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:02:14,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 19:02:14,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:02:14,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 19:02:14,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=3672, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:02:14,582 INFO L87 Difference]: Start difference. First operand 403 states and 415 transitions. Second operand has 64 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:02:20,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:02:20,413 INFO L93 Difference]: Finished difference Result 424 states and 438 transitions. [2022-01-31 19:02:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 19:02:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 140 [2022-01-31 19:02:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:02:20,415 INFO L225 Difference]: With dead ends: 424 [2022-01-31 19:02:20,415 INFO L226 Difference]: Without dead ends: 422 [2022-01-31 19:02:20,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3901 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1705, Invalid=13057, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 19:02:20,416 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 422 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 3501 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 4250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 3501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:02:20,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 515 Invalid, 4250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 3501 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 19:02:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-31 19:02:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 407. [2022-01-31 19:02:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 358 states have (on average 1.0251396648044693) internal successors, (367), 361 states have internal predecessors, (367), 27 states have call successors, (27), 22 states have call predecessors, (27), 21 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 19:02:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 418 transitions. [2022-01-31 19:02:20,868 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 418 transitions. Word has length 140 [2022-01-31 19:02:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:02:20,868 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 418 transitions. [2022-01-31 19:02:20,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 62 states have internal predecessors, (109), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:02:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 418 transitions. [2022-01-31 19:02:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 19:02:20,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:02:20,869 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:02:20,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:02:20,869 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:02:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:02:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1400482807, now seen corresponding path program 44 times [2022-01-31 19:02:20,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:02:20,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062207785] [2022-01-31 19:02:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:02:20,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:02:20,871 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:02:20,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:02:20,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:02:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:28,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:02:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:28,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:02:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:28,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:02:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:28,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:02:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:28,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:02:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:28,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:02:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:28,490 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 19:02:28,490 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:02:28,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062207785] [2022-01-31 19:02:28,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1062207785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:02:28,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:02:28,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 19:02:28,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463732047] [2022-01-31 19:02:28,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:02:28,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 19:02:28,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:02:28,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 19:02:28,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=4460, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:02:28,491 INFO L87 Difference]: Start difference. First operand 407 states and 418 transitions. Second operand has 71 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 69 states have internal predecessors, (114), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:02:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:02:37,262 INFO L93 Difference]: Finished difference Result 432 states and 446 transitions. [2022-01-31 19:02:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 19:02:37,263 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 69 states have internal predecessors, (114), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 140 [2022-01-31 19:02:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:02:37,264 INFO L225 Difference]: With dead ends: 432 [2022-01-31 19:02:37,264 INFO L226 Difference]: Without dead ends: 430 [2022-01-31 19:02:37,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5984 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2483, Invalid=17257, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 19:02:37,265 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 330 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 3992 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 4717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 3992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:02:37,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 553 Invalid, 4717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 3992 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 19:02:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-31 19:02:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 411. [2022-01-31 19:02:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 361 states have (on average 1.0249307479224377) internal successors, (370), 364 states have internal predecessors, (370), 27 states have call successors, (27), 23 states have call predecessors, (27), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 19:02:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 421 transitions. [2022-01-31 19:02:37,722 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 421 transitions. Word has length 140 [2022-01-31 19:02:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:02:37,722 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 421 transitions. [2022-01-31 19:02:37,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 69 states have internal predecessors, (114), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:02:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 421 transitions. [2022-01-31 19:02:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 19:02:37,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:02:37,723 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:02:37,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:02:37,723 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:02:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:02:37,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1827036819, now seen corresponding path program 45 times [2022-01-31 19:02:37,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:02:37,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859705289] [2022-01-31 19:02:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:02:37,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:02:37,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:02:37,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:02:37,732 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:02:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:41,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:02:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:41,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:02:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:41,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:02:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:41,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:02:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:41,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:02:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:41,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:02:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:41,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:02:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:41,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:02:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:41,731 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 19:02:41,731 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:02:41,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859705289] [2022-01-31 19:02:41,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1859705289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:02:41,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:02:41,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:02:41,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188045973] [2022-01-31 19:02:41,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:02:41,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:02:41,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:02:41,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:02:41,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=3454, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:02:41,732 INFO L87 Difference]: Start difference. First operand 411 states and 421 transitions. Second operand has 62 states, 61 states have (on average 1.8360655737704918) internal successors, (112), 60 states have internal predecessors, (112), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:02:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:02:47,112 INFO L93 Difference]: Finished difference Result 432 states and 444 transitions. [2022-01-31 19:02:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 19:02:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.8360655737704918) internal successors, (112), 60 states have internal predecessors, (112), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 148 [2022-01-31 19:02:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:02:47,114 INFO L225 Difference]: With dead ends: 432 [2022-01-31 19:02:47,114 INFO L226 Difference]: Without dead ends: 428 [2022-01-31 19:02:47,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4089 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1620, Invalid=12422, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 19:02:47,115 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 428 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 3520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:02:47,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 469 Invalid, 3520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 2762 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:02:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-31 19:02:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 413. [2022-01-31 19:02:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 363 states have (on average 1.022038567493113) internal successors, (371), 365 states have internal predecessors, (371), 27 states have call successors, (27), 24 states have call predecessors, (27), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 19:02:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 422 transitions. [2022-01-31 19:02:47,574 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 422 transitions. Word has length 148 [2022-01-31 19:02:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:02:47,574 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 422 transitions. [2022-01-31 19:02:47,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.8360655737704918) internal successors, (112), 60 states have internal predecessors, (112), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:02:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 422 transitions. [2022-01-31 19:02:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 19:02:47,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:02:47,577 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:02:47,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:02:47,577 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:02:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:02:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2042860498, now seen corresponding path program 46 times [2022-01-31 19:02:47,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:02:47,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836715950] [2022-01-31 19:02:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:02:47,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:02:47,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:02:47,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:02:47,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:02:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:52,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:02:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:52,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:02:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:02:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:02:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:52,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:02:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:52,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:02:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:52,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:02:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:02:52,547 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 19:02:52,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:02:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836715950] [2022-01-31 19:02:52,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1836715950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:02:52,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:02:52,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 19:02:52,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407472662] [2022-01-31 19:02:52,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:02:52,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 19:02:52,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:02:52,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 19:02:52,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=3698, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:02:52,549 INFO L87 Difference]: Start difference. First operand 413 states and 422 transitions. Second operand has 65 states, 64 states have (on average 1.828125) internal successors, (117), 63 states have internal predecessors, (117), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:02:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:02:58,962 INFO L93 Difference]: Finished difference Result 438 states and 450 transitions. [2022-01-31 19:02:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 19:02:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.828125) internal successors, (117), 63 states have internal predecessors, (117), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 148 [2022-01-31 19:02:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:02:58,963 INFO L225 Difference]: With dead ends: 438 [2022-01-31 19:02:58,963 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 19:02:58,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2145, Invalid=14111, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 19:02:58,964 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 450 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 3660 mSolverCounterSat, 805 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 4465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 805 IncrementalHoareTripleChecker+Valid, 3660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:02:58,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 671 Invalid, 4465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [805 Valid, 3660 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 19:02:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 19:02:59,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 417. [2022-01-31 19:02:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 366 states have (on average 1.0218579234972678) internal successors, (374), 368 states have internal predecessors, (374), 27 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 19:02:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 425 transitions. [2022-01-31 19:02:59,437 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 425 transitions. Word has length 148 [2022-01-31 19:02:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:02:59,438 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 425 transitions. [2022-01-31 19:02:59,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.828125) internal successors, (117), 63 states have internal predecessors, (117), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:02:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 425 transitions. [2022-01-31 19:02:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 19:02:59,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:02:59,439 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:02:59,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:02:59,439 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:02:59,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:02:59,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1143740433, now seen corresponding path program 47 times [2022-01-31 19:02:59,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:02:59,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528985506] [2022-01-31 19:02:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:02:59,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:02:59,440 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:02:59,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:02:59,445 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:02:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:05,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:03:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:05,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:03:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:03:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:05,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:03:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:05,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:03:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:05,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:03:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:05,153 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 19:03:05,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:03:05,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528985506] [2022-01-31 19:03:05,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [528985506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:03:05,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:03:05,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 19:03:05,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436263215] [2022-01-31 19:03:05,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:03:05,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 19:03:05,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:03:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 19:03:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=4917, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:03:05,155 INFO L87 Difference]: Start difference. First operand 417 states and 425 transitions. Second operand has 74 states, 73 states have (on average 1.6712328767123288) internal successors, (122), 72 states have internal predecessors, (122), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:03:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:03:12,848 INFO L93 Difference]: Finished difference Result 546 states and 573 transitions. [2022-01-31 19:03:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 19:03:12,849 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.6712328767123288) internal successors, (122), 72 states have internal predecessors, (122), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 148 [2022-01-31 19:03:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:03:12,850 INFO L225 Difference]: With dead ends: 546 [2022-01-31 19:03:12,850 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 19:03:12,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2151, Invalid=16755, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 19:03:12,852 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 447 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 4840 mSolverCounterSat, 924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 5764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 924 IncrementalHoareTripleChecker+Valid, 4840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:03:12,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 755 Invalid, 5764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [924 Valid, 4840 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 19:03:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 19:03:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 494. [2022-01-31 19:03:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 436 states have (on average 1.025229357798165) internal successors, (447), 439 states have internal predecessors, (447), 33 states have call successors, (33), 26 states have call predecessors, (33), 24 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 19:03:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 510 transitions. [2022-01-31 19:03:13,452 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 510 transitions. Word has length 148 [2022-01-31 19:03:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:03:13,452 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 510 transitions. [2022-01-31 19:03:13,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.6712328767123288) internal successors, (122), 72 states have internal predecessors, (122), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:03:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 510 transitions. [2022-01-31 19:03:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 19:03:13,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:03:13,453 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:03:13,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:03:13,453 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:03:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:03:13,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2114238451, now seen corresponding path program 48 times [2022-01-31 19:03:13,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:03:13,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043795772] [2022-01-31 19:03:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:03:13,455 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:03:13,455 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:03:13,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:03:13,460 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:03:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:13,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:03:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:13,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:03:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:13,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:03:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:13,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:03:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:13,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:03:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:13,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:03:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:13,717 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 19:03:13,717 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:03:13,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043795772] [2022-01-31 19:03:13,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1043795772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:03:13,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:03:13,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:03:13,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770174269] [2022-01-31 19:03:13,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:03:13,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:03:13,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:03:13,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:03:13,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:03:13,718 INFO L87 Difference]: Start difference. First operand 494 states and 510 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:03:15,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:03:15,629 INFO L93 Difference]: Finished difference Result 782 states and 824 transitions. [2022-01-31 19:03:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:03:15,629 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 150 [2022-01-31 19:03:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:03:15,631 INFO L225 Difference]: With dead ends: 782 [2022-01-31 19:03:15,631 INFO L226 Difference]: Without dead ends: 651 [2022-01-31 19:03:15,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=774, Invalid=2886, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:03:15,632 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 870 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 945 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 945 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:03:15,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 149 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [945 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:03:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-01-31 19:03:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 615. [2022-01-31 19:03:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 540 states have (on average 1.0240740740740741) internal successors, (553), 544 states have internal predecessors, (553), 44 states have call successors, (44), 32 states have call predecessors, (44), 30 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 19:03:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 637 transitions. [2022-01-31 19:03:16,430 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 637 transitions. Word has length 150 [2022-01-31 19:03:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:03:16,430 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 637 transitions. [2022-01-31 19:03:16,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:03:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 637 transitions. [2022-01-31 19:03:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 19:03:16,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:03:16,431 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:03:16,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:03:16,431 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:03:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:03:16,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2083780971, now seen corresponding path program 49 times [2022-01-31 19:03:16,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:03:16,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464720806] [2022-01-31 19:03:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:03:16,433 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:03:16,433 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:03:16,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:03:16,438 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:03:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:16,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:03:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:16,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:03:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:16,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:03:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:16,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:03:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:16,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:03:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:16,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:03:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:16,699 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 19:03:16,699 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:03:16,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464720806] [2022-01-31 19:03:16,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [464720806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:03:16,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:03:16,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:03:16,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202249503] [2022-01-31 19:03:16,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:03:16,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:03:16,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:03:16,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:03:16,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:03:16,700 INFO L87 Difference]: Start difference. First operand 615 states and 637 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:03:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:03:18,621 INFO L93 Difference]: Finished difference Result 765 states and 795 transitions. [2022-01-31 19:03:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:03:18,621 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 152 [2022-01-31 19:03:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:03:18,623 INFO L225 Difference]: With dead ends: 765 [2022-01-31 19:03:18,623 INFO L226 Difference]: Without dead ends: 597 [2022-01-31 19:03:18,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=567, Invalid=2189, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:03:18,624 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 267 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:03:18,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 315 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:03:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-31 19:03:19,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 568. [2022-01-31 19:03:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 499 states have (on average 1.0200400801603207) internal successors, (509), 502 states have internal predecessors, (509), 38 states have call successors, (38), 32 states have call predecessors, (38), 30 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 19:03:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 581 transitions. [2022-01-31 19:03:19,330 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 581 transitions. Word has length 152 [2022-01-31 19:03:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:03:19,330 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 581 transitions. [2022-01-31 19:03:19,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:03:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 581 transitions. [2022-01-31 19:03:19,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:03:19,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:03:19,332 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:03:19,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:03:19,332 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:03:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:03:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1935504476, now seen corresponding path program 50 times [2022-01-31 19:03:19,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:03:19,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691110456] [2022-01-31 19:03:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:03:19,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:03:19,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:03:19,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:03:19,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:03:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:23,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:03:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:23,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:03:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:23,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:03:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:23,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:03:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:23,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:03:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:23,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:03:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:23,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:03:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:23,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:03:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:23,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:03:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:03:23,672 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:03:23,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691110456] [2022-01-31 19:03:23,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [691110456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:03:23,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:03:23,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:03:23,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735590842] [2022-01-31 19:03:23,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:03:23,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:03:23,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:03:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:03:23,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3482, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:03:23,674 INFO L87 Difference]: Start difference. First operand 568 states and 581 transitions. Second operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 60 states have internal predecessors, (115), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:03:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:03:29,989 INFO L93 Difference]: Finished difference Result 589 states and 605 transitions. [2022-01-31 19:03:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 19:03:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 60 states have internal predecessors, (115), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 156 [2022-01-31 19:03:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:03:29,991 INFO L225 Difference]: With dead ends: 589 [2022-01-31 19:03:29,991 INFO L226 Difference]: Without dead ends: 458 [2022-01-31 19:03:29,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3341 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1159, Invalid=12647, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 19:03:29,992 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 327 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 4791 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 5340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 4791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:03:29,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 612 Invalid, 5340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 4791 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 19:03:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-31 19:03:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 439. [2022-01-31 19:03:30,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 387 states have (on average 1.0232558139534884) internal successors, (396), 390 states have internal predecessors, (396), 29 states have call successors, (29), 23 states have call predecessors, (29), 22 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 19:03:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 451 transitions. [2022-01-31 19:03:30,563 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 451 transitions. Word has length 156 [2022-01-31 19:03:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:03:30,564 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 451 transitions. [2022-01-31 19:03:30,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 60 states have internal predecessors, (115), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:03:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 451 transitions. [2022-01-31 19:03:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:03:30,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:03:30,565 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:03:30,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:03:30,565 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:03:30,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:03:30,565 INFO L85 PathProgramCache]: Analyzing trace with hash 83035493, now seen corresponding path program 51 times [2022-01-31 19:03:30,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:03:30,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302323624] [2022-01-31 19:03:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:03:30,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:03:30,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:03:30,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:03:30,572 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:03:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:35,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:03:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:35,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:03:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:35,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:03:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:35,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:03:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:35,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:03:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:36,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:03:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:36,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:03:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:36,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:03:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:36,009 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 19:03:36,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:03:36,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302323624] [2022-01-31 19:03:36,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [302323624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:03:36,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:03:36,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 19:03:36,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657203562] [2022-01-31 19:03:36,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:03:36,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 19:03:36,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:03:36,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 19:03:36,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=4123, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:03:36,011 INFO L87 Difference]: Start difference. First operand 439 states and 451 transitions. Second operand has 68 states, 67 states have (on average 1.791044776119403) internal successors, (120), 66 states have internal predecessors, (120), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:03:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:03:42,713 INFO L93 Difference]: Finished difference Result 464 states and 479 transitions. [2022-01-31 19:03:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 19:03:42,714 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.791044776119403) internal successors, (120), 66 states have internal predecessors, (120), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 156 [2022-01-31 19:03:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:03:42,715 INFO L225 Difference]: With dead ends: 464 [2022-01-31 19:03:42,715 INFO L226 Difference]: Without dead ends: 462 [2022-01-31 19:03:42,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4227 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1645, Invalid=13607, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 19:03:42,716 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 514 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 5039 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 6004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 5039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:03:42,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 654 Invalid, 6004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 5039 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 19:03:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-31 19:03:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 443. [2022-01-31 19:03:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 390 states have (on average 1.023076923076923) internal successors, (399), 393 states have internal predecessors, (399), 29 states have call successors, (29), 24 states have call predecessors, (29), 23 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 19:03:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 454 transitions. [2022-01-31 19:03:43,305 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 454 transitions. Word has length 156 [2022-01-31 19:03:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:03:43,306 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 454 transitions. [2022-01-31 19:03:43,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.791044776119403) internal successors, (120), 66 states have internal predecessors, (120), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:03:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 454 transitions. [2022-01-31 19:03:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:03:43,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:03:43,306 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:03:43,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 19:03:43,307 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:03:43,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:03:43,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1551314982, now seen corresponding path program 52 times [2022-01-31 19:03:43,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:03:43,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149231745] [2022-01-31 19:03:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:03:43,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:03:43,308 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:03:43,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:03:43,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:03:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:49,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:03:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:49,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:03:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:49,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:03:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:49,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:03:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:49,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:03:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:49,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:03:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:49,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:03:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:03:49,343 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 19:03:49,343 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:03:49,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149231745] [2022-01-31 19:03:49,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [149231745] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:03:49,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:03:49,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 19:03:49,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91941478] [2022-01-31 19:03:49,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:03:49,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 19:03:49,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:03:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 19:03:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=4828, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:03:49,344 INFO L87 Difference]: Start difference. First operand 443 states and 454 transitions. Second operand has 73 states, 72 states have (on average 1.7361111111111112) internal successors, (125), 71 states have internal predecessors, (125), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:03:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:03:57,295 INFO L93 Difference]: Finished difference Result 472 states and 487 transitions. [2022-01-31 19:03:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:03:57,295 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.7361111111111112) internal successors, (125), 71 states have internal predecessors, (125), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 156 [2022-01-31 19:03:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:03:57,296 INFO L225 Difference]: With dead ends: 472 [2022-01-31 19:03:57,296 INFO L226 Difference]: Without dead ends: 470 [2022-01-31 19:03:57,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5013 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2591, Invalid=17431, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 19:03:57,298 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 623 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 3997 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 5155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 3997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:03:57,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 727 Invalid, 5155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 3997 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 19:03:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-31 19:03:57,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 447. [2022-01-31 19:03:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 393 states have (on average 1.0229007633587786) internal successors, (402), 396 states have internal predecessors, (402), 29 states have call successors, (29), 25 states have call predecessors, (29), 24 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 19:03:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 457 transitions. [2022-01-31 19:03:57,878 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 457 transitions. Word has length 156 [2022-01-31 19:03:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:03:57,879 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 457 transitions. [2022-01-31 19:03:57,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.7361111111111112) internal successors, (125), 71 states have internal predecessors, (125), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:03:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 457 transitions. [2022-01-31 19:03:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:03:57,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:03:57,880 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:03:57,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 19:03:57,880 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:03:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:03:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash -920646681, now seen corresponding path program 53 times [2022-01-31 19:03:57,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:03:57,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991107173] [2022-01-31 19:03:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:03:57,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:03:57,881 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:03:57,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:03:57,887 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:03:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:05,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:04:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:05,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:04:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:05,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:04:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:05,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:04:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:05,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:04:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:05,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:04:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:05,024 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 19:04:05,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:04:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991107173] [2022-01-31 19:04:05,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991107173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:04:05,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:04:05,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 19:04:05,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601660054] [2022-01-31 19:04:05,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:04:05,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 19:04:05,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:04:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 19:04:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=5504, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:04:05,026 INFO L87 Difference]: Start difference. First operand 447 states and 457 transitions. Second operand has 79 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 77 states have internal predecessors, (130), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:04:16,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:04:16,356 INFO L93 Difference]: Finished difference Result 558 states and 587 transitions. [2022-01-31 19:04:16,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 19:04:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 77 states have internal predecessors, (130), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 156 [2022-01-31 19:04:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:04:16,358 INFO L225 Difference]: With dead ends: 558 [2022-01-31 19:04:16,358 INFO L226 Difference]: Without dead ends: 556 [2022-01-31 19:04:16,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9850 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3650, Invalid=28212, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 19:04:16,360 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 582 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 7531 mSolverCounterSat, 1105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 8636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 7531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:04:16,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 1065 Invalid, 8636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 7531 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 19:04:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-31 19:04:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 502. [2022-01-31 19:04:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 441 states have (on average 1.0249433106575965) internal successors, (452), 445 states have internal predecessors, (452), 35 states have call successors, (35), 26 states have call predecessors, (35), 25 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 19:04:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 519 transitions. [2022-01-31 19:04:17,046 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 519 transitions. Word has length 156 [2022-01-31 19:04:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:04:17,046 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 519 transitions. [2022-01-31 19:04:17,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 77 states have internal predecessors, (130), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:04:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 519 transitions. [2022-01-31 19:04:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 19:04:17,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:04:17,047 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:04:17,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 19:04:17,047 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:04:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:04:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash -917553659, now seen corresponding path program 54 times [2022-01-31 19:04:17,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:04:17,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772303258] [2022-01-31 19:04:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:04:17,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:04:17,049 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:04:17,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:04:17,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:04:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:17,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:04:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:17,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:04:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:17,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:04:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:17,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:04:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:17,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:04:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:17,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 19:04:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:17,341 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 19:04:17,341 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:04:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772303258] [2022-01-31 19:04:17,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772303258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:04:17,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:04:17,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:04:17,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236212268] [2022-01-31 19:04:17,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:04:17,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:04:17,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:04:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:04:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:04:17,342 INFO L87 Difference]: Start difference. First operand 502 states and 519 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:04:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:04:19,616 INFO L93 Difference]: Finished difference Result 832 states and 878 transitions. [2022-01-31 19:04:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:04:19,617 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 158 [2022-01-31 19:04:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:04:19,618 INFO L225 Difference]: With dead ends: 832 [2022-01-31 19:04:19,618 INFO L226 Difference]: Without dead ends: 671 [2022-01-31 19:04:19,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=892, Invalid=3398, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:04:19,619 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 1135 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:04:19,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 156 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1229 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:04:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-31 19:04:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 631. [2022-01-31 19:04:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 552 states have (on average 1.0253623188405796) internal successors, (566), 557 states have internal predecessors, (566), 47 states have call successors, (47), 32 states have call predecessors, (47), 31 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 19:04:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 656 transitions. [2022-01-31 19:04:20,562 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 656 transitions. Word has length 158 [2022-01-31 19:04:20,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:04:20,562 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 656 transitions. [2022-01-31 19:04:20,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:04:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 656 transitions. [2022-01-31 19:04:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:04:20,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:04:20,563 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:04:20,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 19:04:20,564 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:04:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:04:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash 783579036, now seen corresponding path program 55 times [2022-01-31 19:04:20,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:04:20,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372939216] [2022-01-31 19:04:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:04:20,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:04:20,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:04:20,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:04:20,571 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:04:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:25,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:04:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:25,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:04:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:25,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:04:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:25,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:04:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:25,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:04:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:25,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:04:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:25,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:04:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:25,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:04:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:25,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:04:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:25,703 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 19:04:25,703 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:04:25,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372939216] [2022-01-31 19:04:25,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [372939216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:04:25,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:04:25,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 19:04:25,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191075792] [2022-01-31 19:04:25,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:04:25,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 19:04:25,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:04:25,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 19:04:25,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=4156, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:04:25,714 INFO L87 Difference]: Start difference. First operand 631 states and 656 transitions. Second operand has 68 states, 67 states have (on average 1.835820895522388) internal successors, (123), 66 states have internal predecessors, (123), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:04:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:04:32,440 INFO L93 Difference]: Finished difference Result 660 states and 689 transitions. [2022-01-31 19:04:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 19:04:32,440 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.835820895522388) internal successors, (123), 66 states have internal predecessors, (123), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 164 [2022-01-31 19:04:32,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:04:32,443 INFO L225 Difference]: With dead ends: 660 [2022-01-31 19:04:32,443 INFO L226 Difference]: Without dead ends: 656 [2022-01-31 19:04:32,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4127 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1357, Invalid=14143, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 19:04:32,444 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 359 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 5147 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 5800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 5147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:04:32,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 674 Invalid, 5800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 5147 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 19:04:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-31 19:04:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 633. [2022-01-31 19:04:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 554 states have (on average 1.023465703971119) internal successors, (567), 558 states have internal predecessors, (567), 47 states have call successors, (47), 33 states have call predecessors, (47), 31 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 19:04:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 657 transitions. [2022-01-31 19:04:33,397 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 657 transitions. Word has length 164 [2022-01-31 19:04:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:04:33,397 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 657 transitions. [2022-01-31 19:04:33,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.835820895522388) internal successors, (123), 66 states have internal predecessors, (123), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:04:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 657 transitions. [2022-01-31 19:04:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:04:33,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:04:33,398 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:04:33,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 19:04:33,399 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:04:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:04:33,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1006218915, now seen corresponding path program 56 times [2022-01-31 19:04:33,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:04:33,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5386727] [2022-01-31 19:04:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:04:33,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:04:33,400 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:04:33,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:04:33,406 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:04:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:39,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:04:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:39,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:04:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:39,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:04:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:39,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:04:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:39,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:04:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:39,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:04:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:39,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:04:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:39,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:04:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:39,444 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 19:04:39,444 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:04:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5386727] [2022-01-31 19:04:39,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [5386727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:04:39,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:04:39,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 19:04:39,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697872557] [2022-01-31 19:04:39,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:04:39,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 19:04:39,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:04:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 19:04:39,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=4308, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:04:39,446 INFO L87 Difference]: Start difference. First operand 633 states and 657 transitions. Second operand has 70 states, 69 states have (on average 1.855072463768116) internal successors, (128), 68 states have internal predecessors, (128), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:04:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:04:46,989 INFO L93 Difference]: Finished difference Result 662 states and 690 transitions. [2022-01-31 19:04:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:04:46,990 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.855072463768116) internal successors, (128), 68 states have internal predecessors, (128), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 164 [2022-01-31 19:04:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:04:46,992 INFO L225 Difference]: With dead ends: 662 [2022-01-31 19:04:46,992 INFO L226 Difference]: Without dead ends: 660 [2022-01-31 19:04:46,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5204 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2452, Invalid=16454, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 19:04:46,993 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 327 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 4352 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 4979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 4352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:04:46,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 757 Invalid, 4979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 4352 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 19:04:46,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-31 19:04:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 637. [2022-01-31 19:04:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 557 states have (on average 1.0233393177737882) internal successors, (570), 561 states have internal predecessors, (570), 47 states have call successors, (47), 34 states have call predecessors, (47), 32 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 19:04:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 660 transitions. [2022-01-31 19:04:47,973 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 660 transitions. Word has length 164 [2022-01-31 19:04:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:04:47,974 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 660 transitions. [2022-01-31 19:04:47,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.855072463768116) internal successors, (128), 68 states have internal predecessors, (128), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:04:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 660 transitions. [2022-01-31 19:04:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 19:04:47,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:04:47,975 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:04:47,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 19:04:47,975 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:04:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:04:47,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2059037567, now seen corresponding path program 57 times [2022-01-31 19:04:47,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:04:47,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251802426] [2022-01-31 19:04:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:04:47,976 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:04:47,977 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:04:47,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:04:47,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:04:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:48,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:04:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:48,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:04:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:48,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:04:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:48,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 19:04:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:48,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 19:04:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:48,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 19:04:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:48,268 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 19:04:48,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:04:48,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251802426] [2022-01-31 19:04:48,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [251802426] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:04:48,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:04:48,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:04:48,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211582164] [2022-01-31 19:04:48,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:04:48,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:04:48,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:04:48,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:04:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:04:48,269 INFO L87 Difference]: Start difference. First operand 637 states and 660 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:04:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:04:50,621 INFO L93 Difference]: Finished difference Result 799 states and 832 transitions. [2022-01-31 19:04:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:04:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 162 [2022-01-31 19:04:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:04:50,623 INFO L225 Difference]: With dead ends: 799 [2022-01-31 19:04:50,623 INFO L226 Difference]: Without dead ends: 647 [2022-01-31 19:04:50,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=658, Invalid=2534, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:04:50,623 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 262 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 2847 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 2847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:04:50,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 472 Invalid, 3153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 2847 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:04:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-01-31 19:04:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 614. [2022-01-31 19:04:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 540 states have (on average 1.0185185185185186) internal successors, (550), 543 states have internal predecessors, (550), 41 states have call successors, (41), 34 states have call predecessors, (41), 32 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 19:04:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 628 transitions. [2022-01-31 19:04:51,528 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 628 transitions. Word has length 162 [2022-01-31 19:04:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:04:51,528 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 628 transitions. [2022-01-31 19:04:51,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:04:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 628 transitions. [2022-01-31 19:04:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:04:51,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:04:51,529 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:04:51,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 19:04:51,529 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:04:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:04:51,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1530649630, now seen corresponding path program 58 times [2022-01-31 19:04:51,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:04:51,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584067332] [2022-01-31 19:04:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:04:51,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:04:51,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:04:51,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:04:51,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:04:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:57,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:04:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:57,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:04:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:57,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:04:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:57,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:04:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:57,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:04:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:57,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:04:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:57,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:04:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:04:57,716 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 19:04:57,716 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:04:57,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584067332] [2022-01-31 19:04:57,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [584067332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:04:57,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:04:57,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:04:57,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320625637] [2022-01-31 19:04:57,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:04:57,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:04:57,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:04:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:04:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=5474, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:04:57,717 INFO L87 Difference]: Start difference. First operand 614 states and 628 transitions. Second operand has 78 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 76 states have internal predecessors, (133), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:05:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:05:10,397 INFO L93 Difference]: Finished difference Result 647 states and 666 transitions. [2022-01-31 19:05:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 19:05:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 76 states have internal predecessors, (133), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 164 [2022-01-31 19:05:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:05:10,399 INFO L225 Difference]: With dead ends: 647 [2022-01-31 19:05:10,399 INFO L226 Difference]: Without dead ends: 645 [2022-01-31 19:05:10,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7924 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2974, Invalid=28178, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 19:05:10,400 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 642 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 10833 mSolverCounterSat, 1238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 12071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1238 IncrementalHoareTripleChecker+Valid, 10833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:05:10,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 1368 Invalid, 12071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1238 Valid, 10833 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-01-31 19:05:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-31 19:05:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 618. [2022-01-31 19:05:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 543 states have (on average 1.01841620626151) internal successors, (553), 546 states have internal predecessors, (553), 41 states have call successors, (41), 35 states have call predecessors, (41), 33 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 19:05:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 631 transitions. [2022-01-31 19:05:11,332 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 631 transitions. Word has length 164 [2022-01-31 19:05:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:05:11,332 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 631 transitions. [2022-01-31 19:05:11,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 76 states have internal predecessors, (133), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:05:11,332 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 631 transitions. [2022-01-31 19:05:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:05:11,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:05:11,333 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:05:11,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 19:05:11,333 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:05:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:05:11,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1673127969, now seen corresponding path program 59 times [2022-01-31 19:05:11,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:05:11,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638928050] [2022-01-31 19:05:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:05:11,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:05:11,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:05:11,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:05:11,342 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:05:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:22,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:05:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:22,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:05:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:22,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:05:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:22,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:05:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:22,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:05:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:22,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:05:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:22,085 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 19:05:22,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:05:22,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638928050] [2022-01-31 19:05:22,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1638928050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:05:22,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:05:22,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:05:22,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014200491] [2022-01-31 19:05:22,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:05:22,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:05:22,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:05:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:05:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=5417, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:05:22,087 INFO L87 Difference]: Start difference. First operand 618 states and 631 transitions. Second operand has 78 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:05:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:05:34,239 INFO L93 Difference]: Finished difference Result 829 states and 880 transitions. [2022-01-31 19:05:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 19:05:34,239 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 164 [2022-01-31 19:05:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:05:34,242 INFO L225 Difference]: With dead ends: 829 [2022-01-31 19:05:34,242 INFO L226 Difference]: Without dead ends: 827 [2022-01-31 19:05:34,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8586 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=4397, Invalid=26755, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 19:05:34,243 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 725 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 5236 mSolverCounterSat, 1422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 6658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1422 IncrementalHoareTripleChecker+Valid, 5236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:05:34,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 621 Invalid, 6658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1422 Valid, 5236 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 19:05:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-01-31 19:05:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 703. [2022-01-31 19:05:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 621 states have (on average 1.0209339774557167) internal successors, (634), 625 states have internal predecessors, (634), 47 states have call successors, (47), 36 states have call predecessors, (47), 34 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 19:05:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 724 transitions. [2022-01-31 19:05:35,299 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 724 transitions. Word has length 164 [2022-01-31 19:05:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:05:35,299 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 724 transitions. [2022-01-31 19:05:35,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:05:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 724 transitions. [2022-01-31 19:05:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 19:05:35,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:05:35,300 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:05:35,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 19:05:35,300 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:05:35,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:05:35,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1423500291, now seen corresponding path program 60 times [2022-01-31 19:05:35,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:05:35,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108351837] [2022-01-31 19:05:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:05:35,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:05:35,302 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:05:35,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:05:35,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:05:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:35,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:05:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:35,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:05:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:35,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:05:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:35,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:05:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:35,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 19:05:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:35,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 19:05:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:35,610 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 19:05:35,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:05:35,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108351837] [2022-01-31 19:05:35,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1108351837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:05:35,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:05:35,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:05:35,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294747600] [2022-01-31 19:05:35,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:05:35,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:05:35,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:05:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:05:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:05:35,612 INFO L87 Difference]: Start difference. First operand 703 states and 724 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:05:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:05:38,903 INFO L93 Difference]: Finished difference Result 994 states and 1039 transitions. [2022-01-31 19:05:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 19:05:38,903 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 166 [2022-01-31 19:05:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:05:38,905 INFO L225 Difference]: With dead ends: 994 [2022-01-31 19:05:38,905 INFO L226 Difference]: Without dead ends: 884 [2022-01-31 19:05:38,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1337, Invalid=5305, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:05:38,906 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1669 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 1766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1766 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:05:38,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 166 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1766 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:05:38,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-01-31 19:05:40,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 840. [2022-01-31 19:05:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 739 states have (on average 1.020297699594046) internal successors, (754), 744 states have internal predecessors, (754), 60 states have call successors, (60), 42 states have call predecessors, (60), 40 states have return successors, (55), 53 states have call predecessors, (55), 55 states have call successors, (55) [2022-01-31 19:05:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 869 transitions. [2022-01-31 19:05:40,319 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 869 transitions. Word has length 166 [2022-01-31 19:05:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:05:40,320 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 869 transitions. [2022-01-31 19:05:40,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:05:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 869 transitions. [2022-01-31 19:05:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:05:40,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:05:40,321 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:05:40,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 19:05:40,321 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:05:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:05:40,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1536672467, now seen corresponding path program 61 times [2022-01-31 19:05:40,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:05:40,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758425274] [2022-01-31 19:05:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:05:40,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:05:40,323 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:05:40,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:05:40,330 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:05:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:05:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:05:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:05:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:05:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:05:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:05:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:05:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:05:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:05:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:05:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:45,560 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 19:05:45,560 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:05:45,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758425274] [2022-01-31 19:05:45,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758425274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:05:45,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:05:45,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 19:05:45,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576344021] [2022-01-31 19:05:45,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:05:45,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 19:05:45,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:05:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 19:05:45,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=4039, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:05:45,562 INFO L87 Difference]: Start difference. First operand 840 states and 869 transitions. Second operand has 67 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 65 states have internal predecessors, (126), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 19:05:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:05:52,684 INFO L93 Difference]: Finished difference Result 861 states and 893 transitions. [2022-01-31 19:05:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 19:05:52,685 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 65 states have internal predecessors, (126), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 172 [2022-01-31 19:05:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:05:52,687 INFO L225 Difference]: With dead ends: 861 [2022-01-31 19:05:52,687 INFO L226 Difference]: Without dead ends: 716 [2022-01-31 19:05:52,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3694 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1829, Invalid=13921, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 19:05:52,688 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 488 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 3860 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 4669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 3860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:05:52,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 622 Invalid, 4669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 3860 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 19:05:52,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-31 19:05:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 697. [2022-01-31 19:05:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 615 states have (on average 1.0227642276422764) internal successors, (629), 620 states have internal predecessors, (629), 50 states have call successors, (50), 32 states have call predecessors, (50), 31 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-31 19:05:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 725 transitions. [2022-01-31 19:05:53,902 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 725 transitions. Word has length 172 [2022-01-31 19:05:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:05:53,903 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 725 transitions. [2022-01-31 19:05:53,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 65 states have internal predecessors, (126), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 19:05:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 725 transitions. [2022-01-31 19:05:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 19:05:53,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:05:53,904 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:05:53,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 19:05:53,904 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:05:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:05:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash -501116581, now seen corresponding path program 62 times [2022-01-31 19:05:53,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:05:53,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339525729] [2022-01-31 19:05:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:05:53,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:05:53,906 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:05:53,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:05:53,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:05:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:54,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:05:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:54,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:05:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:54,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:05:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:54,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:05:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:54,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 19:05:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:54,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 19:05:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:05:54,221 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 19:05:54,221 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:05:54,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339525729] [2022-01-31 19:05:54,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [339525729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:05:54,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:05:54,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:05:54,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050471220] [2022-01-31 19:05:54,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:05:54,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:05:54,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:05:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:05:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:05:54,222 INFO L87 Difference]: Start difference. First operand 697 states and 725 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:05:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:05:56,773 INFO L93 Difference]: Finished difference Result 871 states and 911 transitions. [2022-01-31 19:05:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:05:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 168 [2022-01-31 19:05:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:05:56,775 INFO L225 Difference]: With dead ends: 871 [2022-01-31 19:05:56,775 INFO L226 Difference]: Without dead ends: 683 [2022-01-31 19:05:56,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=756, Invalid=2904, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:05:56,776 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 278 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:05:56,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 403 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:05:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-31 19:05:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 646. [2022-01-31 19:05:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 570 states have (on average 1.0192982456140351) internal successors, (581), 574 states have internal predecessors, (581), 44 states have call successors, (44), 32 states have call predecessors, (44), 31 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 19:05:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 665 transitions. [2022-01-31 19:05:57,866 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 665 transitions. Word has length 168 [2022-01-31 19:05:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:05:57,866 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 665 transitions. [2022-01-31 19:05:57,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:05:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 665 transitions. [2022-01-31 19:05:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:05:57,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:05:57,867 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:05:57,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 19:05:57,867 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:05:57,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:05:57,867 INFO L85 PathProgramCache]: Analyzing trace with hash -644330604, now seen corresponding path program 63 times [2022-01-31 19:05:57,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:05:57,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644494956] [2022-01-31 19:05:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:05:57,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:05:57,869 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:05:57,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:05:57,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:05:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:03,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:06:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:03,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:06:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:03,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:06:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:03,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:06:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:03,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:06:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:03,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:06:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:03,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:06:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:03,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:06:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:03,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:06:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:03,847 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 19:06:03,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:06:03,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644494956] [2022-01-31 19:06:03,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [644494956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:06:03,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:06:03,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 19:06:03,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012992274] [2022-01-31 19:06:03,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:06:03,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 19:06:03,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:06:03,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 19:06:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=4823, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:06:03,856 INFO L87 Difference]: Start difference. First operand 646 states and 665 transitions. Second operand has 73 states, 72 states have (on average 1.8194444444444444) internal successors, (131), 71 states have internal predecessors, (131), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:06:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:06:13,405 INFO L93 Difference]: Finished difference Result 675 states and 698 transitions. [2022-01-31 19:06:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 19:06:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.8194444444444444) internal successors, (131), 71 states have internal predecessors, (131), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 172 [2022-01-31 19:06:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:06:13,407 INFO L225 Difference]: With dead ends: 675 [2022-01-31 19:06:13,407 INFO L226 Difference]: Without dead ends: 673 [2022-01-31 19:06:13,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6951 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2250, Invalid=19802, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 19:06:13,408 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 396 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 5844 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 6587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 5844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:06:13,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 706 Invalid, 6587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 5844 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 19:06:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-31 19:06:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 650. [2022-01-31 19:06:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 573 states have (on average 1.019197207678883) internal successors, (584), 577 states have internal predecessors, (584), 44 states have call successors, (44), 33 states have call predecessors, (44), 32 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 19:06:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 668 transitions. [2022-01-31 19:06:14,505 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 668 transitions. Word has length 172 [2022-01-31 19:06:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:06:14,505 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 668 transitions. [2022-01-31 19:06:14,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.8194444444444444) internal successors, (131), 71 states have internal predecessors, (131), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:06:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 668 transitions. [2022-01-31 19:06:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:06:14,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:06:14,506 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:06:14,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 19:06:14,507 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:06:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:06:14,507 INFO L85 PathProgramCache]: Analyzing trace with hash 389776725, now seen corresponding path program 64 times [2022-01-31 19:06:14,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:06:14,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266763271] [2022-01-31 19:06:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:06:14,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:06:14,508 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:06:14,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:06:14,515 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:06:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:22,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:06:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:22,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:06:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:22,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:06:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:22,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:06:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:22,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:06:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:22,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:06:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:22,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:06:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:22,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:06:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:22,085 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 19:06:22,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:06:22,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266763271] [2022-01-31 19:06:22,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1266763271] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:06:22,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:06:22,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 19:06:22,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889209451] [2022-01-31 19:06:22,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:06:22,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 19:06:22,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:06:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 19:06:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=5986, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:06:22,087 INFO L87 Difference]: Start difference. First operand 650 states and 668 transitions. Second operand has 81 states, 80 states have (on average 1.7) internal successors, (136), 79 states have internal predecessors, (136), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:06:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:06:31,967 INFO L93 Difference]: Finished difference Result 683 states and 706 transitions. [2022-01-31 19:06:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 19:06:31,968 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.7) internal successors, (136), 79 states have internal predecessors, (136), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 172 [2022-01-31 19:06:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:06:31,969 INFO L225 Difference]: With dead ends: 683 [2022-01-31 19:06:31,969 INFO L226 Difference]: Without dead ends: 681 [2022-01-31 19:06:31,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5756 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2986, Invalid=20884, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 19:06:31,971 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 555 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 5018 mSolverCounterSat, 1071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 6089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1071 IncrementalHoareTripleChecker+Valid, 5018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:06:31,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 843 Invalid, 6089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1071 Valid, 5018 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 19:06:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-31 19:06:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 654. [2022-01-31 19:06:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 576 states have (on average 1.0190972222222223) internal successors, (587), 580 states have internal predecessors, (587), 44 states have call successors, (44), 34 states have call predecessors, (44), 33 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 19:06:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 671 transitions. [2022-01-31 19:06:33,092 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 671 transitions. Word has length 172 [2022-01-31 19:06:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:06:33,092 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 671 transitions. [2022-01-31 19:06:33,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 1.7) internal successors, (136), 79 states have internal predecessors, (136), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:06:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 671 transitions. [2022-01-31 19:06:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:06:33,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:06:33,093 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:06:33,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 19:06:33,093 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:06:33,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:06:33,094 INFO L85 PathProgramCache]: Analyzing trace with hash 997355542, now seen corresponding path program 65 times [2022-01-31 19:06:33,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:06:33,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906701146] [2022-01-31 19:06:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:06:33,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:06:33,095 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:06:33,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:06:33,103 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:06:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:42,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:06:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:06:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:42,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:06:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:06:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:42,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:06:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:42,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:06:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:42,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:06:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:06:42,936 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 19:06:42,936 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:06:42,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906701146] [2022-01-31 19:06:42,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [906701146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:06:42,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:06:42,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:06:42,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677827636] [2022-01-31 19:06:42,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:06:42,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:06:42,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:06:42,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:06:42,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=5421, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:06:42,938 INFO L87 Difference]: Start difference. First operand 654 states and 671 transitions. Second operand has 78 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 76 states have internal predecessors, (141), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:06:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:06:53,842 INFO L93 Difference]: Finished difference Result 691 states and 714 transitions. [2022-01-31 19:06:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 19:06:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 76 states have internal predecessors, (141), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 172 [2022-01-31 19:06:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:06:53,844 INFO L225 Difference]: With dead ends: 691 [2022-01-31 19:06:53,844 INFO L226 Difference]: Without dead ends: 689 [2022-01-31 19:06:53,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9329 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3844, Invalid=26258, Unknown=0, NotChecked=0, Total=30102 [2022-01-31 19:06:53,846 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 449 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 4844 mSolverCounterSat, 977 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 5821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 977 IncrementalHoareTripleChecker+Valid, 4844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:06:53,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 705 Invalid, 5821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [977 Valid, 4844 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 19:06:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-01-31 19:06:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 658. [2022-01-31 19:06:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 579 states have (on average 1.0189982728842832) internal successors, (590), 583 states have internal predecessors, (590), 44 states have call successors, (44), 35 states have call predecessors, (44), 34 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 19:06:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 674 transitions. [2022-01-31 19:06:54,982 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 674 transitions. Word has length 172 [2022-01-31 19:06:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:06:54,982 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 674 transitions. [2022-01-31 19:06:54,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 76 states have internal predecessors, (141), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:06:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 674 transitions. [2022-01-31 19:06:54,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:06:54,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:06:54,983 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:06:54,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 19:06:54,983 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:06:54,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:06:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1613630423, now seen corresponding path program 66 times [2022-01-31 19:06:54,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:06:54,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800850661] [2022-01-31 19:06:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:06:54,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:06:54,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:06:54,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:06:54,992 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:06:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:03,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:07:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:04,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:07:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:04,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:07:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:04,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:07:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:04,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:07:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:04,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:07:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:04,011 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 19:07:04,012 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:07:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800850661] [2022-01-31 19:07:04,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [800850661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:07:04,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:07:04,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 19:07:04,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005204505] [2022-01-31 19:07:04,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:07:04,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 19:07:04,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:07:04,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 19:07:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=6230, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:07:04,013 INFO L87 Difference]: Start difference. First operand 658 states and 674 transitions. Second operand has 83 states, 82 states have (on average 1.7804878048780488) internal successors, (146), 81 states have internal predecessors, (146), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:07:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:07:16,992 INFO L93 Difference]: Finished difference Result 820 states and 860 transitions. [2022-01-31 19:07:16,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 19:07:16,992 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.7804878048780488) internal successors, (146), 81 states have internal predecessors, (146), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 172 [2022-01-31 19:07:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:07:16,995 INFO L225 Difference]: With dead ends: 820 [2022-01-31 19:07:16,995 INFO L226 Difference]: Without dead ends: 818 [2022-01-31 19:07:16,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8643 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=4193, Invalid=26959, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 19:07:16,996 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 562 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 5071 mSolverCounterSat, 1187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 6258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1187 IncrementalHoareTripleChecker+Valid, 5071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:07:16,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 639 Invalid, 6258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1187 Valid, 5071 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 19:07:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-01-31 19:07:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 747. [2022-01-31 19:07:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 661 states have (on average 1.021180030257186) internal successors, (675), 666 states have internal predecessors, (675), 50 states have call successors, (50), 36 states have call predecessors, (50), 35 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-31 19:07:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 771 transitions. [2022-01-31 19:07:18,313 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 771 transitions. Word has length 172 [2022-01-31 19:07:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:07:18,313 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 771 transitions. [2022-01-31 19:07:18,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.7804878048780488) internal successors, (146), 81 states have internal predecessors, (146), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:07:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 771 transitions. [2022-01-31 19:07:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:07:18,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:07:18,314 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:07:18,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 19:07:18,315 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:07:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:07:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1735057909, now seen corresponding path program 67 times [2022-01-31 19:07:18,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:07:18,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274149998] [2022-01-31 19:07:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:07:18,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:07:18,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:07:18,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:07:18,324 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:07:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:18,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:07:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:18,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:07:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:18,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:07:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:18,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 19:07:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:18,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 19:07:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:18,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 19:07:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:18,656 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 19:07:18,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:07:18,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274149998] [2022-01-31 19:07:18,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274149998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:07:18,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:07:18,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:07:18,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209198763] [2022-01-31 19:07:18,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:07:18,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:07:18,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:07:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:07:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=845, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:07:18,657 INFO L87 Difference]: Start difference. First operand 747 states and 771 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:07:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:07:22,224 INFO L93 Difference]: Finished difference Result 1083 states and 1139 transitions. [2022-01-31 19:07:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 19:07:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 174 [2022-01-31 19:07:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:07:22,227 INFO L225 Difference]: With dead ends: 1083 [2022-01-31 19:07:22,227 INFO L226 Difference]: Without dead ends: 940 [2022-01-31 19:07:22,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1512, Invalid=6144, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:07:22,228 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1526 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 1675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1675 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:07:22,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1542 Valid, 232 Invalid, 2899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1675 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:07:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-01-31 19:07:23,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 892. [2022-01-31 19:07:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 786 states have (on average 1.020356234096692) internal successors, (802), 792 states have internal predecessors, (802), 64 states have call successors, (64), 42 states have call predecessors, (64), 41 states have return successors, (59), 57 states have call predecessors, (59), 59 states have call successors, (59) [2022-01-31 19:07:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 925 transitions. [2022-01-31 19:07:23,946 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 925 transitions. Word has length 174 [2022-01-31 19:07:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:07:23,946 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 925 transitions. [2022-01-31 19:07:23,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:07:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 925 transitions. [2022-01-31 19:07:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 19:07:23,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:07:23,947 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:07:23,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 19:07:23,947 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:07:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:07:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2101616331, now seen corresponding path program 68 times [2022-01-31 19:07:23,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:07:23,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670742422] [2022-01-31 19:07:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:07:23,950 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:07:23,950 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:07:23,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:07:23,958 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:07:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:07:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:07:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:07:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:07:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:07:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:07:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:07:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:07:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:07:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 19:07:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:30,210 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 19:07:30,210 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:07:30,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670742422] [2022-01-31 19:07:30,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [670742422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:07:30,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:07:30,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 19:07:30,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279157282] [2022-01-31 19:07:30,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:07:30,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 19:07:30,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:07:30,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 19:07:30,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=4880, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:07:30,211 INFO L87 Difference]: Start difference. First operand 892 states and 925 transitions. Second operand has 73 states, 72 states have (on average 1.8611111111111112) internal successors, (134), 71 states have internal predecessors, (134), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 19:07:39,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:07:39,625 INFO L93 Difference]: Finished difference Result 921 states and 958 transitions. [2022-01-31 19:07:39,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 19:07:39,626 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.8611111111111112) internal successors, (134), 71 states have internal predecessors, (134), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 180 [2022-01-31 19:07:39,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:07:39,628 INFO L225 Difference]: With dead ends: 921 [2022-01-31 19:07:39,628 INFO L226 Difference]: Without dead ends: 917 [2022-01-31 19:07:39,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6574 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2518, Invalid=20132, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 19:07:39,629 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 540 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 4450 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 5497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1047 IncrementalHoareTripleChecker+Valid, 4450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:07:39,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 630 Invalid, 5497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1047 Valid, 4450 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 19:07:39,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-01-31 19:07:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 894. [2022-01-31 19:07:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 788 states have (on average 1.0190355329949239) internal successors, (803), 793 states have internal predecessors, (803), 64 states have call successors, (64), 43 states have call predecessors, (64), 41 states have return successors, (59), 57 states have call predecessors, (59), 59 states have call successors, (59) [2022-01-31 19:07:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 926 transitions. [2022-01-31 19:07:41,351 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 926 transitions. Word has length 180 [2022-01-31 19:07:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:07:41,351 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 926 transitions. [2022-01-31 19:07:41,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.8611111111111112) internal successors, (134), 71 states have internal predecessors, (134), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 19:07:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 926 transitions. [2022-01-31 19:07:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 19:07:41,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:07:41,353 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:07:41,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 19:07:41,353 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:07:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:07:41,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1697331539, now seen corresponding path program 69 times [2022-01-31 19:07:41,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:07:41,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181616981] [2022-01-31 19:07:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:07:41,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:07:41,354 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:07:41,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:07:41,363 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:07:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:41,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:07:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:41,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:07:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:41,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:07:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:41,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 19:07:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:41,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 19:07:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:41,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 19:07:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:41,713 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 19:07:41,713 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:07:41,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181616981] [2022-01-31 19:07:41,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [181616981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:07:41,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:07:41,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:07:41,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037689286] [2022-01-31 19:07:41,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:07:41,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:07:41,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:07:41,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:07:41,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:07:41,714 INFO L87 Difference]: Start difference. First operand 894 states and 926 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:07:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:07:45,266 INFO L93 Difference]: Finished difference Result 1080 states and 1126 transitions. [2022-01-31 19:07:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:07:45,266 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 176 [2022-01-31 19:07:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:07:45,268 INFO L225 Difference]: With dead ends: 1080 [2022-01-31 19:07:45,268 INFO L226 Difference]: Without dead ends: 882 [2022-01-31 19:07:45,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=3299, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:07:45,269 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 294 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 3904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:07:45,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 573 Invalid, 3904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 3530 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:07:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-01-31 19:07:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 841. [2022-01-31 19:07:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 741 states have (on average 1.0161943319838056) internal successors, (753), 745 states have internal predecessors, (753), 58 states have call successors, (58), 43 states have call predecessors, (58), 41 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-31 19:07:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 864 transitions. [2022-01-31 19:07:46,866 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 864 transitions. Word has length 176 [2022-01-31 19:07:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:07:46,866 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 864 transitions. [2022-01-31 19:07:46,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:07:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 864 transitions. [2022-01-31 19:07:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 19:07:46,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:07:46,868 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:07:46,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 19:07:46,868 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:07:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:07:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1815480204, now seen corresponding path program 70 times [2022-01-31 19:07:46,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:07:46,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813702737] [2022-01-31 19:07:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:07:46,869 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:07:46,869 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:07:46,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:07:46,877 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:07:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:54,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:07:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:54,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:07:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:54,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:07:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:54,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:07:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:54,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:07:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:54,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:07:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:54,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:07:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:54,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:07:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:54,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 19:07:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:07:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:07:54,238 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:07:54,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813702737] [2022-01-31 19:07:54,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [813702737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:07:54,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:07:54,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 19:07:54,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253900389] [2022-01-31 19:07:54,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:07:54,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 19:07:54,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:07:54,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 19:07:54,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=4949, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:07:54,239 INFO L87 Difference]: Start difference. First operand 841 states and 864 transitions. Second operand has 75 states, 74 states have (on average 1.8783783783783783) internal successors, (139), 73 states have internal predecessors, (139), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:08:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:03,058 INFO L93 Difference]: Finished difference Result 874 states and 902 transitions. [2022-01-31 19:08:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 19:08:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.8783783783783783) internal successors, (139), 73 states have internal predecessors, (139), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 180 [2022-01-31 19:08:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:03,060 INFO L225 Difference]: With dead ends: 874 [2022-01-31 19:08:03,060 INFO L226 Difference]: Without dead ends: 872 [2022-01-31 19:08:03,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5953 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2783, Invalid=18973, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 19:08:03,061 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 577 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 4967 mSolverCounterSat, 991 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 5958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 991 IncrementalHoareTripleChecker+Valid, 4967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:03,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 865 Invalid, 5958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [991 Valid, 4967 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 19:08:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-31 19:08:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 845. [2022-01-31 19:08:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 744 states have (on average 1.0161290322580645) internal successors, (756), 748 states have internal predecessors, (756), 58 states have call successors, (58), 44 states have call predecessors, (58), 42 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-31 19:08:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 867 transitions. [2022-01-31 19:08:04,659 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 867 transitions. Word has length 180 [2022-01-31 19:08:04,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:04,660 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 867 transitions. [2022-01-31 19:08:04,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.8783783783783783) internal successors, (139), 73 states have internal predecessors, (139), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:08:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 867 transitions. [2022-01-31 19:08:04,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 19:08:04,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:04,661 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:04,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 19:08:04,661 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:04,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1333436749, now seen corresponding path program 71 times [2022-01-31 19:08:04,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:04,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324677653] [2022-01-31 19:08:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:04,662 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:04,663 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:04,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:04,670 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:08:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:08:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:08:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:08:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:08:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:08:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 19:08:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:15,069 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 19:08:15,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324677653] [2022-01-31 19:08:15,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [324677653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:15,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:15,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 19:08:15,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180264545] [2022-01-31 19:08:15,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:15,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 19:08:15,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:15,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 19:08:15,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=5554, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:08:15,071 INFO L87 Difference]: Start difference. First operand 845 states and 867 transitions. Second operand has 79 states, 78 states have (on average 1.8461538461538463) internal successors, (144), 77 states have internal predecessors, (144), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:08:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:25,807 INFO L93 Difference]: Finished difference Result 882 states and 910 transitions. [2022-01-31 19:08:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 19:08:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.8461538461538463) internal successors, (144), 77 states have internal predecessors, (144), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 180 [2022-01-31 19:08:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:25,809 INFO L225 Difference]: With dead ends: 882 [2022-01-31 19:08:25,809 INFO L226 Difference]: Without dead ends: 880 [2022-01-31 19:08:25,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7175 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3480, Invalid=22926, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 19:08:25,811 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 557 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 4843 mSolverCounterSat, 1058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 5901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 4843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:25,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 729 Invalid, 5901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1058 Valid, 4843 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 19:08:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-01-31 19:08:27,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 849. [2022-01-31 19:08:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 747 states have (on average 1.0160642570281124) internal successors, (759), 751 states have internal predecessors, (759), 58 states have call successors, (58), 45 states have call predecessors, (58), 43 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-31 19:08:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 870 transitions. [2022-01-31 19:08:27,467 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 870 transitions. Word has length 180 [2022-01-31 19:08:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:27,468 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 870 transitions. [2022-01-31 19:08:27,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.8461538461538463) internal successors, (144), 77 states have internal predecessors, (144), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:08:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 870 transitions. [2022-01-31 19:08:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 19:08:27,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:27,469 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:27,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 19:08:27,469 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1073550322, now seen corresponding path program 72 times [2022-01-31 19:08:27,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:27,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468889973] [2022-01-31 19:08:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:27,471 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:27,471 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:27,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:27,480 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:35,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:08:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:35,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:08:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:35,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:08:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:35,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:08:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:35,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:08:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:35,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 19:08:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:08:35,474 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:35,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468889973] [2022-01-31 19:08:35,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [468889973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:35,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:35,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 19:08:35,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988954767] [2022-01-31 19:08:35,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:35,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 19:08:35,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 19:08:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=6234, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:08:35,475 INFO L87 Difference]: Start difference. First operand 849 states and 870 transitions. Second operand has 83 states, 82 states have (on average 1.8170731707317074) internal successors, (149), 81 states have internal predecessors, (149), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:08:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:08:47,842 INFO L93 Difference]: Finished difference Result 890 states and 918 transitions. [2022-01-31 19:08:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 19:08:47,843 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.8170731707317074) internal successors, (149), 81 states have internal predecessors, (149), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 180 [2022-01-31 19:08:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:08:47,844 INFO L225 Difference]: With dead ends: 890 [2022-01-31 19:08:47,844 INFO L226 Difference]: Without dead ends: 888 [2022-01-31 19:08:47,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=4060, Invalid=26390, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 19:08:47,845 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 658 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 5112 mSolverCounterSat, 1315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 6427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1315 IncrementalHoareTripleChecker+Valid, 5112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:08:47,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 694 Invalid, 6427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1315 Valid, 5112 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 19:08:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-01-31 19:08:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 853. [2022-01-31 19:08:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 750 states have (on average 1.016) internal successors, (762), 754 states have internal predecessors, (762), 58 states have call successors, (58), 46 states have call predecessors, (58), 44 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-31 19:08:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 873 transitions. [2022-01-31 19:08:49,577 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 873 transitions. Word has length 180 [2022-01-31 19:08:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:08:49,578 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 873 transitions. [2022-01-31 19:08:49,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.8170731707317074) internal successors, (149), 81 states have internal predecessors, (149), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:08:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 873 transitions. [2022-01-31 19:08:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 19:08:49,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:08:49,579 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:08:49,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 19:08:49,579 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:08:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:08:49,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1237313487, now seen corresponding path program 73 times [2022-01-31 19:08:49,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:08:49,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529965350] [2022-01-31 19:08:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:08:49,581 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:08:49,581 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:08:49,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:08:49,590 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:08:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:58,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:08:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:58,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:08:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:58,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:08:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:58,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:08:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:58,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:08:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:58,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 19:08:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:08:58,189 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 19:08:58,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:08:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529965350] [2022-01-31 19:08:58,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1529965350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:08:58,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:08:58,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 19:08:58,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675103293] [2022-01-31 19:08:58,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:08:58,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 19:08:58,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:08:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 19:08:58,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=6531, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:08:58,191 INFO L87 Difference]: Start difference. First operand 853 states and 873 transitions. Second operand has 85 states, 84 states have (on average 1.8333333333333333) internal successors, (154), 83 states have internal predecessors, (154), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:09:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:11,691 INFO L93 Difference]: Finished difference Result 1027 states and 1073 transitions. [2022-01-31 19:09:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 19:09:11,691 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.8333333333333333) internal successors, (154), 83 states have internal predecessors, (154), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 180 [2022-01-31 19:09:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:11,693 INFO L225 Difference]: With dead ends: 1027 [2022-01-31 19:09:11,693 INFO L226 Difference]: Without dead ends: 1025 [2022-01-31 19:09:11,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9541 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=4664, Invalid=29376, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 19:09:11,695 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 677 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 5664 mSolverCounterSat, 1414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 7078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1414 IncrementalHoareTripleChecker+Valid, 5664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:11,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 663 Invalid, 7078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1414 Valid, 5664 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 19:09:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-01-31 19:09:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 946. [2022-01-31 19:09:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 836 states have (on average 1.0179425837320575) internal successors, (851), 841 states have internal predecessors, (851), 64 states have call successors, (64), 47 states have call predecessors, (64), 45 states have return successors, (59), 57 states have call predecessors, (59), 59 states have call successors, (59) [2022-01-31 19:09:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 974 transitions. [2022-01-31 19:09:13,518 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 974 transitions. Word has length 180 [2022-01-31 19:09:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:13,519 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 974 transitions. [2022-01-31 19:09:13,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 1.8333333333333333) internal successors, (154), 83 states have internal predecessors, (154), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:09:13,519 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 974 transitions. [2022-01-31 19:09:13,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 19:09:13,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:13,520 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:13,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 19:09:13,520 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash 134385645, now seen corresponding path program 74 times [2022-01-31 19:09:13,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:13,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130676425] [2022-01-31 19:09:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:13,522 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:13,522 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:13,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:13,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:13,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:13,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:09:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:13,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 19:09:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:13,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 19:09:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:13,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 19:09:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:13,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 19:09:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:13,920 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 19:09:13,920 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:13,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130676425] [2022-01-31 19:09:13,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2130676425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:13,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:13,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:09:13,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759915970] [2022-01-31 19:09:13,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:13,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:09:13,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:13,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:09:13,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:09:13,922 INFO L87 Difference]: Start difference. First operand 946 states and 974 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:18,713 INFO L93 Difference]: Finished difference Result 1298 states and 1360 transitions. [2022-01-31 19:09:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 19:09:18,713 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 182 [2022-01-31 19:09:18,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:18,715 INFO L225 Difference]: With dead ends: 1298 [2022-01-31 19:09:18,715 INFO L226 Difference]: Without dead ends: 1151 [2022-01-31 19:09:18,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3191 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2141, Invalid=8989, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 19:09:18,716 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 2007 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 2157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2024 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2157 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:18,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2024 Valid, 225 Invalid, 3568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2157 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:09:18,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2022-01-31 19:09:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1099. [2022-01-31 19:09:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 968 states have (on average 1.0175619834710743) internal successors, (985), 974 states have internal predecessors, (985), 79 states have call successors, (79), 53 states have call predecessors, (79), 51 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2022-01-31 19:09:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1137 transitions. [2022-01-31 19:09:21,012 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1137 transitions. Word has length 182 [2022-01-31 19:09:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:21,012 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1137 transitions. [2022-01-31 19:09:21,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1137 transitions. [2022-01-31 19:09:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:09:21,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:21,014 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:21,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 19:09:21,014 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:21,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2011116798, now seen corresponding path program 75 times [2022-01-31 19:09:21,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:21,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264071319] [2022-01-31 19:09:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:21,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:21,016 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:21,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:21,025 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:09:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:09:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:09:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:09:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:09:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:09:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:09:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:09:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 19:09:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 19:09:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:27,457 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 19:09:27,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:27,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264071319] [2022-01-31 19:09:27,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [264071319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:27,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:27,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 19:09:27,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725552321] [2022-01-31 19:09:27,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:27,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 19:09:27,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 19:09:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=4734, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:09:27,458 INFO L87 Difference]: Start difference. First operand 1099 states and 1137 transitions. Second operand has 72 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 70 states have internal predecessors, (137), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 19:09:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:37,840 INFO L93 Difference]: Finished difference Result 1128 states and 1171 transitions. [2022-01-31 19:09:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:09:37,840 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 70 states have internal predecessors, (137), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 188 [2022-01-31 19:09:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:37,842 INFO L225 Difference]: With dead ends: 1128 [2022-01-31 19:09:37,842 INFO L226 Difference]: Without dead ends: 969 [2022-01-31 19:09:37,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4744 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1447, Invalid=17459, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 19:09:37,843 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 409 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 7246 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 7928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 7246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:37,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 897 Invalid, 7928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 7246 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 19:09:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-31 19:09:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 942. [2022-01-31 19:09:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 832 states have (on average 1.0192307692307692) internal successors, (848), 838 states have internal predecessors, (848), 68 states have call successors, (68), 42 states have call predecessors, (68), 41 states have return successors, (63), 61 states have call predecessors, (63), 63 states have call successors, (63) [2022-01-31 19:09:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 979 transitions. [2022-01-31 19:09:39,979 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 979 transitions. Word has length 188 [2022-01-31 19:09:39,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:39,979 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 979 transitions. [2022-01-31 19:09:39,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 70 states have internal predecessors, (137), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 19:09:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 979 transitions. [2022-01-31 19:09:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:09:39,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:39,981 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:39,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 19:09:39,981 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:39,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1035836733, now seen corresponding path program 76 times [2022-01-31 19:09:39,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:39,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430391117] [2022-01-31 19:09:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:39,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:39,982 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:39,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:39,992 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:09:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:09:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:09:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:09:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:09:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:09:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:09:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 19:09:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 19:09:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:47,069 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 19:09:47,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:47,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430391117] [2022-01-31 19:09:47,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430391117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:47,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:47,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:09:47,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540480724] [2022-01-31 19:09:47,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:47,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:09:47,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:47,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:09:47,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=5569, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:09:47,071 INFO L87 Difference]: Start difference. First operand 942 states and 979 transitions. Second operand has 78 states, 77 states have (on average 1.844155844155844) internal successors, (142), 76 states have internal predecessors, (142), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 19:09:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:58,199 INFO L93 Difference]: Finished difference Result 975 states and 1017 transitions. [2022-01-31 19:09:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 19:09:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.844155844155844) internal successors, (142), 76 states have internal predecessors, (142), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 188 [2022-01-31 19:09:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:58,201 INFO L225 Difference]: With dead ends: 975 [2022-01-31 19:09:58,201 INFO L226 Difference]: Without dead ends: 973 [2022-01-31 19:09:58,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5964 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=2826, Invalid=21666, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 19:09:58,202 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 622 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 4599 mSolverCounterSat, 1125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1125 IncrementalHoareTripleChecker+Valid, 4599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:58,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 736 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1125 Valid, 4599 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 19:09:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-01-31 19:10:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 946. [2022-01-31 19:10:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 835 states have (on average 1.0191616766467066) internal successors, (851), 841 states have internal predecessors, (851), 68 states have call successors, (68), 43 states have call predecessors, (68), 42 states have return successors, (63), 61 states have call predecessors, (63), 63 states have call successors, (63) [2022-01-31 19:10:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 982 transitions. [2022-01-31 19:10:00,273 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 982 transitions. Word has length 188 [2022-01-31 19:10:00,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:00,273 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 982 transitions. [2022-01-31 19:10:00,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.844155844155844) internal successors, (142), 76 states have internal predecessors, (142), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 19:10:00,274 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 982 transitions. [2022-01-31 19:10:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 19:10:00,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:00,275 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:00,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 19:10:00,275 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:00,275 INFO L85 PathProgramCache]: Analyzing trace with hash -545863349, now seen corresponding path program 77 times [2022-01-31 19:10:00,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:00,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652600382] [2022-01-31 19:10:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:00,277 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:00,277 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:00,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:00,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:00,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:10:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:00,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 19:10:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:00,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 19:10:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:00,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 19:10:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:00,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 19:10:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:00,675 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:00,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652600382] [2022-01-31 19:10:00,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [652600382] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:00,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:00,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:10:00,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554175303] [2022-01-31 19:10:00,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:00,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:10:00,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:00,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:10:00,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:10:00,676 INFO L87 Difference]: Start difference. First operand 946 states and 982 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:04,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:04,763 INFO L93 Difference]: Finished difference Result 1144 states and 1196 transitions. [2022-01-31 19:10:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:10:04,763 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 184 [2022-01-31 19:10:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:04,764 INFO L225 Difference]: With dead ends: 1144 [2022-01-31 19:10:04,765 INFO L226 Difference]: Without dead ends: 936 [2022-01-31 19:10:04,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=973, Invalid=3719, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:10:04,765 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 335 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 3211 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 3601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 3211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:04,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 464 Invalid, 3601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 3211 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:10:04,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-01-31 19:10:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 891. [2022-01-31 19:10:06,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 786 states have (on average 1.0165394402035624) internal successors, (799), 791 states have internal predecessors, (799), 62 states have call successors, (62), 43 states have call predecessors, (62), 42 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2022-01-31 19:10:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 918 transitions. [2022-01-31 19:10:06,769 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 918 transitions. Word has length 184 [2022-01-31 19:10:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:06,769 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 918 transitions. [2022-01-31 19:10:06,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:06,769 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 918 transitions. [2022-01-31 19:10:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:10:06,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:06,771 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:06,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 19:10:06,771 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:06,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:06,771 INFO L85 PathProgramCache]: Analyzing trace with hash -814371964, now seen corresponding path program 78 times [2022-01-31 19:10:06,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:06,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377112773] [2022-01-31 19:10:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:06,772 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:06,772 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:06,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:06,783 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:10:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:10:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:10:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:10:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:10:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:10:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 19:10:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 19:10:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:14,112 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:14,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377112773] [2022-01-31 19:10:14,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377112773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:14,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:14,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 19:10:14,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176955012] [2022-01-31 19:10:14,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:14,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 19:10:14,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:14,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 19:10:14,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=6467, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:10:14,113 INFO L87 Difference]: Start difference. First operand 891 states and 918 transitions. Second operand has 84 states, 82 states have (on average 1.829268292682927) internal successors, (150), 83 states have internal predecessors, (150), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:10:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:29,891 INFO L93 Difference]: Finished difference Result 926 states and 960 transitions. [2022-01-31 19:10:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 19:10:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 82 states have (on average 1.829268292682927) internal successors, (150), 83 states have internal predecessors, (150), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 188 [2022-01-31 19:10:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:29,894 INFO L225 Difference]: With dead ends: 926 [2022-01-31 19:10:29,894 INFO L226 Difference]: Without dead ends: 924 [2022-01-31 19:10:29,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11941 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4966, Invalid=35234, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 19:10:29,896 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 485 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 5363 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 6406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 5363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:29,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 851 Invalid, 6406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 5363 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 19:10:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-31 19:10:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 893. [2022-01-31 19:10:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 788 states have (on average 1.016497461928934) internal successors, (801), 792 states have internal predecessors, (801), 62 states have call successors, (62), 44 states have call predecessors, (62), 42 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2022-01-31 19:10:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 920 transitions. [2022-01-31 19:10:31,936 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 920 transitions. Word has length 188 [2022-01-31 19:10:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:31,936 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 920 transitions. [2022-01-31 19:10:31,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 82 states have (on average 1.829268292682927) internal successors, (150), 83 states have internal predecessors, (150), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:10:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 920 transitions. [2022-01-31 19:10:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:10:31,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:31,938 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:31,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 19:10:31,938 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:31,938 INFO L85 PathProgramCache]: Analyzing trace with hash -945052347, now seen corresponding path program 79 times [2022-01-31 19:10:31,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:31,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283153826] [2022-01-31 19:10:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:31,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:31,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:31,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:31,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:10:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:10:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:10:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:10:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:10:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 19:10:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 19:10:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,505 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 19:10:41,505 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:41,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283153826] [2022-01-31 19:10:41,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [283153826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:41,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:41,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 19:10:41,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939132997] [2022-01-31 19:10:41,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:41,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 19:10:41,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:41,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 19:10:41,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=6422, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:10:41,507 INFO L87 Difference]: Start difference. First operand 893 states and 920 transitions. Second operand has 84 states, 83 states have (on average 1.8313253012048192) internal successors, (152), 82 states have internal predecessors, (152), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)