/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-crafted/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:33:40,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:33:40,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:33:40,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:33:40,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:33:40,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:33:40,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:33:40,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:33:40,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:33:40,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:33:40,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:33:40,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:33:40,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:33:40,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:33:40,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:33:40,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:33:40,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:33:40,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:33:40,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:33:40,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:33:40,484 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 19:33:40,489 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:33:40,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:33:40,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:33:40,490 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:33:40,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:33:40,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:33:40,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:33:40,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:33:40,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:33:40,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:33:40,493 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:33:40,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:33:40,494 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:33:40,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:33:40,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:33:40,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:33:40,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:33:40,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:33:40,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:33:40,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:33:40,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:33:40,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:33:40,495 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:33:40,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:33:40,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:33:40,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:33:40,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:33:40,690 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:33:40,692 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:33:40,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2022-01-31 19:33:40,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc96b3ea2/7b40c45c40074406b449af4244bc6373/FLAGa39dedac7 [2022-01-31 19:33:41,058 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:33:41,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2022-01-31 19:33:41,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc96b3ea2/7b40c45c40074406b449af4244bc6373/FLAGa39dedac7 [2022-01-31 19:33:41,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc96b3ea2/7b40c45c40074406b449af4244bc6373 [2022-01-31 19:33:41,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:33:41,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:33:41,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:33:41,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:33:41,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:33:41,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:33:41" (1/1) ... [2022-01-31 19:33:41,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb2751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41, skipping insertion in model container [2022-01-31 19:33:41,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:33:41" (1/1) ... [2022-01-31 19:33:41,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:33:41,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:33:41,654 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-crafted/zero_sum_const5.c[406,419] [2022-01-31 19:33:41,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:33:41,690 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:33:41,696 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-crafted/zero_sum_const5.c[406,419] [2022-01-31 19:33:41,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:33:41,711 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:33:41,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41 WrapperNode [2022-01-31 19:33:41,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:33:41,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:33:41,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:33:41,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:33:41,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41" (1/1) ... [2022-01-31 19:33:41,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41" (1/1) ... [2022-01-31 19:33:41,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41" (1/1) ... [2022-01-31 19:33:41,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41" (1/1) ... [2022-01-31 19:33:41,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41" (1/1) ... [2022-01-31 19:33:41,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41" (1/1) ... [2022-01-31 19:33:41,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41" (1/1) ... [2022-01-31 19:33:41,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:33:41,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:33:41,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:33:41,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:33:41,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41" (1/1) ... [2022-01-31 19:33:41,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:33:41,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:33:41,766 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 19:33:41,775 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 19:33:41,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:33:41,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:33:41,809 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:33:41,809 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:33:41,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:33:41,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:33:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:33:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:33:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:33:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:33:41,862 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:33:41,863 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:33:42,041 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:33:42,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:33:42,045 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-01-31 19:33:42,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:33:42 BoogieIcfgContainer [2022-01-31 19:33:42,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:33:42,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:33:42,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:33:42,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:33:42,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:33:41" (1/3) ... [2022-01-31 19:33:42,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fc6555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:33:42, skipping insertion in model container [2022-01-31 19:33:42,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:41" (2/3) ... [2022-01-31 19:33:42,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fc6555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:33:42, skipping insertion in model container [2022-01-31 19:33:42,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:33:42" (3/3) ... [2022-01-31 19:33:42,066 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2022-01-31 19:33:42,070 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:33:42,070 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:33:42,098 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:33:42,103 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 19:33:42,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:33:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 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 19:33:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 19:33:42,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:42,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:42,119 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1546601285, now seen corresponding path program 1 times [2022-01-31 19:33:42,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:42,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081766636] [2022-01-31 19:33:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:42,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:42,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:42,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:42,334 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 19:33:42,335 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:42,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081766636] [2022-01-31 19:33:42,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2081766636] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:42,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:42,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:33:42,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447548964] [2022-01-31 19:33:42,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:42,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:33:42,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:42,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:33:42,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:33:42,368 INFO L87 Difference]: Start difference. First operand has 51 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 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 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:42,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:42,518 INFO L93 Difference]: Finished difference Result 95 states and 141 transitions. [2022-01-31 19:33:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:33:42,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 19:33:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:42,527 INFO L225 Difference]: With dead ends: 95 [2022-01-31 19:33:42,527 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 19:33:42,529 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 19:33:42,533 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:42,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:33:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 19:33:42,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-01-31 19:33:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-01-31 19:33:42,563 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 32 [2022-01-31 19:33:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:42,564 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-01-31 19:33:42,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-01-31 19:33:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 19:33:42,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:42,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:42,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:33:42,567 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1769864063, now seen corresponding path program 1 times [2022-01-31 19:33:42,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:42,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089544277] [2022-01-31 19:33:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:42,582 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:42,582 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:42,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:42,587 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:42,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:42,690 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 19:33:42,690 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:42,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089544277] [2022-01-31 19:33:42,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089544277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:42,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:42,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:33:42,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772148094] [2022-01-31 19:33:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:42,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:33:42,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:33:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:33:42,693 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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 19:33:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:42,814 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2022-01-31 19:33:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:33:42,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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 34 [2022-01-31 19:33:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:42,815 INFO L225 Difference]: With dead ends: 98 [2022-01-31 19:33:42,815 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 19:33:42,816 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 19:33:42,817 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:42,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 27 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:33:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 19:33:42,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-01-31 19:33:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-01-31 19:33:42,825 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 34 [2022-01-31 19:33:42,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:42,825 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-01-31 19:33:42,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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 19:33:42,825 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-01-31 19:33:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:33:42,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:42,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:42,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:33:42,827 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:42,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:42,827 INFO L85 PathProgramCache]: Analyzing trace with hash -845230611, now seen corresponding path program 1 times [2022-01-31 19:33:42,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:42,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954735327] [2022-01-31 19:33:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:42,829 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:42,829 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:42,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:42,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:42,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:42,886 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 19:33:42,887 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954735327] [2022-01-31 19:33:42,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954735327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:42,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:42,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:33:42,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454371330] [2022-01-31 19:33:42,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:42,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:33:42,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:33:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:33:42,888 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:42,980 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2022-01-31 19:33:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:33:42,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 19:33:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:42,982 INFO L225 Difference]: With dead ends: 102 [2022-01-31 19:33:42,982 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 19:33:42,983 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 19:33:42,983 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:42,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:33:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 19:33:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 19:33:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-31 19:33:42,999 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2022-01-31 19:33:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:43,000 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-31 19:33:43,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-31 19:33:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 19:33:43,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:43,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:43,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:33:43,001 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash 312682443, now seen corresponding path program 2 times [2022-01-31 19:33:43,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:43,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414261248] [2022-01-31 19:33:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:43,003 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:43,003 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:43,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:43,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:43,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:43,099 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 19:33:43,100 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:43,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414261248] [2022-01-31 19:33:43,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [414261248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:43,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:43,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:33:43,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804507012] [2022-01-31 19:33:43,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:43,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:33:43,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:43,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:33:43,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:33:43,101 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:43,239 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2022-01-31 19:33:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:33:43,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 19:33:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:43,240 INFO L225 Difference]: With dead ends: 118 [2022-01-31 19:33:43,240 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 19:33:43,240 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 19:33:43,241 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 79 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:43,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 31 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:33:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 19:33:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-31 19:33:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-01-31 19:33:43,250 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2022-01-31 19:33:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:43,250 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-01-31 19:33:43,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-01-31 19:33:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 19:33:43,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:43,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:43,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:33:43,252 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1666836425, now seen corresponding path program 3 times [2022-01-31 19:33:43,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:43,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186344205] [2022-01-31 19:33:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:43,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:43,254 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:43,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:43,255 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:44,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:44,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:44,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186344205] [2022-01-31 19:33:44,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [186344205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:44,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:44,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:33:44,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559810432] [2022-01-31 19:33:44,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:44,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:33:44,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:33:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:33:44,561 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 18 states have internal predecessors, (72), 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 19:33:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:44,997 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2022-01-31 19:33:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:33:45,000 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 18 states have internal predecessors, (72), 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 76 [2022-01-31 19:33:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:45,001 INFO L225 Difference]: With dead ends: 139 [2022-01-31 19:33:45,001 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 19:33:45,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 20 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:33:45,002 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:45,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 164 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:33:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 19:33:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2022-01-31 19:33:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.16) internal successors, (145), 125 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2022-01-31 19:33:45,017 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2022-01-31 19:33:45,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:45,017 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2022-01-31 19:33:45,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 18 states have internal predecessors, (72), 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 19:33:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2022-01-31 19:33:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 19:33:45,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:45,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:45,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:33:45,019 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:45,019 INFO L85 PathProgramCache]: Analyzing trace with hash 146081557, now seen corresponding path program 4 times [2022-01-31 19:33:45,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:45,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231480293] [2022-01-31 19:33:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:45,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:45,021 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:45,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:45,021 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:45,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:45,082 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 19:33:45,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231480293] [2022-01-31 19:33:45,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1231480293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:45,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:45,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:33:45,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149350991] [2022-01-31 19:33:45,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:45,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:33:45,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:45,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:33:45,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:33:45,083 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:45,359 INFO L93 Difference]: Finished difference Result 284 states and 330 transitions. [2022-01-31 19:33:45,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:33:45,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 19:33:45,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:45,360 INFO L225 Difference]: With dead ends: 284 [2022-01-31 19:33:45,360 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 19:33:45,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:33:45,361 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 200 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:45,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 41 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 19:33:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 145. [2022-01-31 19:33:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1357142857142857) internal successors, (159), 140 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2022-01-31 19:33:45,374 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 78 [2022-01-31 19:33:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:45,374 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2022-01-31 19:33:45,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2022-01-31 19:33:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 19:33:45,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:45,375 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:45,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:33:45,375 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:45,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:45,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1096972493, now seen corresponding path program 5 times [2022-01-31 19:33:45,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:45,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899038045] [2022-01-31 19:33:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:45,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:45,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:45,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:45,378 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:45,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:45,435 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:45,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899038045] [2022-01-31 19:33:45,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [899038045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:45,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:45,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:33:45,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269200573] [2022-01-31 19:33:45,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:45,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:33:45,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:33:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:33:45,436 INFO L87 Difference]: Start difference. First operand 145 states and 163 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:45,660 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2022-01-31 19:33:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:33:45,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 19:33:45,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:45,661 INFO L225 Difference]: With dead ends: 152 [2022-01-31 19:33:45,661 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 19:33:45,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:33:45,662 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 194 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:45,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 43 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 19:33:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-01-31 19:33:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2022-01-31 19:33:45,670 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2022-01-31 19:33:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:45,670 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2022-01-31 19:33:45,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2022-01-31 19:33:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 19:33:45,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:45,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:45,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:33:45,672 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2019660031, now seen corresponding path program 6 times [2022-01-31 19:33:45,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:45,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726151479] [2022-01-31 19:33:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:45,673 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:45,673 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:45,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:45,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:49,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:49,685 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 19:33:49,686 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726151479] [2022-01-31 19:33:49,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [726151479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:49,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:49,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 19:33:49,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514044022] [2022-01-31 19:33:49,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:49,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 19:33:49,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:49,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 19:33:49,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:33:49,688 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 58 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 56 states have internal predecessors, (94), 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 19:33:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:52,606 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2022-01-31 19:33:52,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:33:52,606 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 56 states have internal predecessors, (94), 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 98 [2022-01-31 19:33:52,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:52,607 INFO L225 Difference]: With dead ends: 189 [2022-01-31 19:33:52,607 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 19:33:52,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 19 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=464, Invalid=5698, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:33:52,609 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 3282 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 3694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 3282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:52,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 201 Invalid, 3694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 3282 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 19:33:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 19:33:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2022-01-31 19:33:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.1226993865030674) internal successors, (183), 163 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 187 transitions. [2022-01-31 19:33:52,626 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 187 transitions. Word has length 98 [2022-01-31 19:33:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:52,626 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 187 transitions. [2022-01-31 19:33:52,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 56 states have internal predecessors, (94), 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 19:33:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 187 transitions. [2022-01-31 19:33:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 19:33:52,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:52,627 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:52,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:33:52,627 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:52,628 INFO L85 PathProgramCache]: Analyzing trace with hash -781937825, now seen corresponding path program 7 times [2022-01-31 19:33:52,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:52,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509354721] [2022-01-31 19:33:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:52,629 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:52,629 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:52,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:52,630 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:52,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:52,714 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:52,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509354721] [2022-01-31 19:33:52,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509354721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:52,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:52,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:33:52,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353465036] [2022-01-31 19:33:52,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:52,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:33:52,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:52,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:33:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:33:52,716 INFO L87 Difference]: Start difference. First operand 168 states and 187 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 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 19:33:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:53,063 INFO L93 Difference]: Finished difference Result 360 states and 406 transitions. [2022-01-31 19:33:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:33:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 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 100 [2022-01-31 19:33:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:53,064 INFO L225 Difference]: With dead ends: 360 [2022-01-31 19:33:53,064 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 19:33:53,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 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 19:33:53,066 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 242 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:53,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 47 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:53,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 19:33:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2022-01-31 19:33:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.1067415730337078) internal successors, (197), 178 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 201 transitions. [2022-01-31 19:33:53,086 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 201 transitions. Word has length 100 [2022-01-31 19:33:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:53,087 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 201 transitions. [2022-01-31 19:33:53,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 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 19:33:53,087 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 201 transitions. [2022-01-31 19:33:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:33:53,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:53,088 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:53,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:33:53,088 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1327442173, now seen corresponding path program 8 times [2022-01-31 19:33:53,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:53,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313821212] [2022-01-31 19:33:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:53,090 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:53,090 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:53,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:53,091 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:53,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:53,185 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 19:33:53,185 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:53,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313821212] [2022-01-31 19:33:53,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [313821212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:53,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:53,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:33:53,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971377554] [2022-01-31 19:33:53,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:53,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:33:53,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:33:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:33:53,186 INFO L87 Difference]: Start difference. First operand 183 states and 201 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 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 19:33:53,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:53,498 INFO L93 Difference]: Finished difference Result 190 states and 208 transitions. [2022-01-31 19:33:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:33:53,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 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 102 [2022-01-31 19:33:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:53,499 INFO L225 Difference]: With dead ends: 190 [2022-01-31 19:33:53,499 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:33:53,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:33:53,501 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 203 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:53,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 55 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:33:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-01-31 19:33:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 116 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2022-01-31 19:33:53,513 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 102 [2022-01-31 19:33:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:53,514 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2022-01-31 19:33:53,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 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 19:33:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2022-01-31 19:33:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:33:53,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:53,516 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:53,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:33:53,516 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:53,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:53,517 INFO L85 PathProgramCache]: Analyzing trace with hash 715878987, now seen corresponding path program 9 times [2022-01-31 19:33:53,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:53,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136274704] [2022-01-31 19:33:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:53,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:53,520 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:53,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:53,521 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:58,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:58,657 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 19:33:58,657 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:58,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136274704] [2022-01-31 19:33:58,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136274704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:58,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:58,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 19:33:58,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353649721] [2022-01-31 19:33:58,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:58,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 19:33:58,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 19:33:58,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=4217, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:33:58,660 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 68 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 66 states have internal predecessors, (116), 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 19:34:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:07,516 INFO L93 Difference]: Finished difference Result 368 states and 417 transitions. [2022-01-31 19:34:07,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 19:34:07,516 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 66 states have internal predecessors, (116), 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 120 [2022-01-31 19:34:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:07,519 INFO L225 Difference]: With dead ends: 368 [2022-01-31 19:34:07,520 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 19:34:07,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 21 SyntacticMatches, 20 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4618 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2000, Invalid=13750, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 19:34:07,523 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 982 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 7346 mSolverCounterSat, 2559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 9905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2559 IncrementalHoareTripleChecker+Valid, 7346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:07,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 278 Invalid, 9905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2559 Valid, 7346 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-01-31 19:34:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 19:34:07,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 126. [2022-01-31 19:34:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0991735537190082) internal successors, (133), 121 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2022-01-31 19:34:07,549 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 120 [2022-01-31 19:34:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:07,549 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2022-01-31 19:34:07,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 66 states have internal predecessors, (116), 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 19:34:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2022-01-31 19:34:07,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:34:07,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:07,551 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:07,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:34:07,551 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:07,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1778281001, now seen corresponding path program 10 times [2022-01-31 19:34:07,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:07,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914704519] [2022-01-31 19:34:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:07,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:07,554 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:07,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:07,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:07,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:07,639 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 19:34:07,639 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:07,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914704519] [2022-01-31 19:34:07,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [914704519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:07,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:07,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:34:07,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574920758] [2022-01-31 19:34:07,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:07,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:34:07,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:34:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:34:07,641 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:08,043 INFO L93 Difference]: Finished difference Result 361 states and 400 transitions. [2022-01-31 19:34:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:34:08,043 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 19:34:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:08,044 INFO L225 Difference]: With dead ends: 361 [2022-01-31 19:34:08,044 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 19:34:08,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 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 19:34:08,045 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 293 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:08,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 47 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:34:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 19:34:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2022-01-31 19:34:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 136 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2022-01-31 19:34:08,072 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 122 [2022-01-31 19:34:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:08,072 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2022-01-31 19:34:08,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2022-01-31 19:34:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 19:34:08,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:08,073 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:08,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:34:08,073 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash 74634551, now seen corresponding path program 11 times [2022-01-31 19:34:08,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:08,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949377920] [2022-01-31 19:34:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:08,074 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:08,075 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:08,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:08,075 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:08,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:08,186 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 19:34:08,186 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:08,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949377920] [2022-01-31 19:34:08,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1949377920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:08,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:08,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:34:08,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134456307] [2022-01-31 19:34:08,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:08,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:34:08,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:08,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:34:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:34:08,187 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:08,633 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2022-01-31 19:34:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:34:08,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 19:34:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:08,634 INFO L225 Difference]: With dead ends: 148 [2022-01-31 19:34:08,634 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 19:34:08,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:34:08,635 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 178 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:08,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 67 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:34:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 19:34:08,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-01-31 19:34:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2022-01-31 19:34:08,663 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 140 [2022-01-31 19:34:08,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:08,664 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2022-01-31 19:34:08,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:08,664 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2022-01-31 19:34:08,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:34:08,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:08,665 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:08,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:34:08,665 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash -277298667, now seen corresponding path program 12 times [2022-01-31 19:34:08,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:08,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661855434] [2022-01-31 19:34:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:08,668 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:08,668 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:08,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:08,670 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:17,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:17,889 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 19:34:17,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:17,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661855434] [2022-01-31 19:34:17,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [661855434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:17,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:17,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 19:34:17,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903801509] [2022-01-31 19:34:17,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:17,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 19:34:17,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 19:34:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=8227, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:34:17,893 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 94 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 92 states have internal predecessors, (138), 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 19:34:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:28,191 INFO L93 Difference]: Finished difference Result 505 states and 545 transitions. [2022-01-31 19:34:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 19:34:28,191 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 92 states have internal predecessors, (138), 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 142 [2022-01-31 19:34:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:28,192 INFO L225 Difference]: With dead ends: 505 [2022-01-31 19:34:28,192 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 19:34:28,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 6 SyntacticMatches, 30 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6664 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1388, Invalid=20664, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 19:34:28,197 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 7875 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 9418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 7875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:28,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 304 Invalid, 9418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1543 Valid, 7875 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-31 19:34:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 19:34:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 246. [2022-01-31 19:34:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.0829875518672198) internal successors, (261), 241 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 265 transitions. [2022-01-31 19:34:28,260 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 265 transitions. Word has length 142 [2022-01-31 19:34:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:28,260 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 265 transitions. [2022-01-31 19:34:28,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 92 states have internal predecessors, (138), 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 19:34:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 265 transitions. [2022-01-31 19:34:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 19:34:28,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:28,261 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:28,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:34:28,261 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash -891575855, now seen corresponding path program 13 times [2022-01-31 19:34:28,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:28,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423611906] [2022-01-31 19:34:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:28,263 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:28,263 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:28,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:28,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:28,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:28,388 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 19:34:28,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:28,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423611906] [2022-01-31 19:34:28,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1423611906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:28,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:28,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:34:28,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487181049] [2022-01-31 19:34:28,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:28,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:34:28,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:34:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:34:28,389 INFO L87 Difference]: Start difference. First operand 246 states and 265 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:28,900 INFO L93 Difference]: Finished difference Result 367 states and 403 transitions. [2022-01-31 19:34:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:34:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 19:34:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:28,901 INFO L225 Difference]: With dead ends: 367 [2022-01-31 19:34:28,902 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 19:34:28,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:34:28,902 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 368 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:28,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 53 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:34:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 19:34:28,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-01-31 19:34:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.06875) internal successors, (171), 160 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2022-01-31 19:34:28,940 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 146 [2022-01-31 19:34:28,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:28,940 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2022-01-31 19:34:28,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2022-01-31 19:34:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:34:28,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:28,941 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:28,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:34:28,941 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:28,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash 926547551, now seen corresponding path program 14 times [2022-01-31 19:34:28,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:28,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651080984] [2022-01-31 19:34:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:28,943 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:28,943 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:28,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:28,944 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:43,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:43,407 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:43,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651080984] [2022-01-31 19:34:43,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1651080984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:43,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:43,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 19:34:43,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075772715] [2022-01-31 19:34:43,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:43,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 19:34:43,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:43,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 19:34:43,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=13541, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 19:34:43,410 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand has 120 states, 120 states have (on average 1.3333333333333333) internal successors, (160), 118 states have internal predecessors, (160), 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 19:35:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:08,343 INFO L93 Difference]: Finished difference Result 576 states and 623 transitions. [2022-01-31 19:35:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 19:35:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.3333333333333333) internal successors, (160), 118 states have internal predecessors, (160), 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 164 [2022-01-31 19:35:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:08,344 INFO L225 Difference]: With dead ends: 576 [2022-01-31 19:35:08,344 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 19:35:08,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 6 SyntacticMatches, 26 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11472 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=3225, Invalid=33831, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 19:35:08,347 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2125 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 16557 mSolverCounterSat, 4832 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2125 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 21389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4832 IncrementalHoareTripleChecker+Valid, 16557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:08,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2125 Valid, 436 Invalid, 21389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4832 Valid, 16557 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-01-31 19:35:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 19:35:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 264. [2022-01-31 19:35:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0694980694980696) internal successors, (277), 259 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 281 transitions. [2022-01-31 19:35:08,417 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 281 transitions. Word has length 164 [2022-01-31 19:35:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:08,417 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 281 transitions. [2022-01-31 19:35:08,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.3333333333333333) internal successors, (160), 118 states have internal predecessors, (160), 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 19:35:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 281 transitions. [2022-01-31 19:35:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:35:08,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:08,418 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:08,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:35:08,419 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:08,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:08,419 INFO L85 PathProgramCache]: Analyzing trace with hash -693726441, now seen corresponding path program 15 times [2022-01-31 19:35:08,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:08,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196977856] [2022-01-31 19:35:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:08,420 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:08,420 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:08,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:08,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:08,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:08,549 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 19:35:08,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:08,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196977856] [2022-01-31 19:35:08,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1196977856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:08,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:08,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:35:08,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522407593] [2022-01-31 19:35:08,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:08,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:35:08,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:35:08,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:35:08,551 INFO L87 Difference]: Start difference. First operand 264 states and 281 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 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 19:35:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:09,188 INFO L93 Difference]: Finished difference Result 399 states and 432 transitions. [2022-01-31 19:35:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:35:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 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 172 [2022-01-31 19:35:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:09,189 INFO L225 Difference]: With dead ends: 399 [2022-01-31 19:35:09,189 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 19:35:09,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:35:09,190 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 386 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:09,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 59 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:35:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 19:35:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-01-31 19:35:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0604395604395604) internal successors, (193), 182 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 197 transitions. [2022-01-31 19:35:09,240 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 197 transitions. Word has length 172 [2022-01-31 19:35:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:09,240 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 197 transitions. [2022-01-31 19:35:09,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 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 19:35:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 197 transitions. [2022-01-31 19:35:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 19:35:09,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:09,241 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:09,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:35:09,241 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash 78300969, now seen corresponding path program 16 times [2022-01-31 19:35:09,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:09,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136340164] [2022-01-31 19:35:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:09,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:09,243 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:09,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:09,243 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:29,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:29,626 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 19:35:29,626 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:29,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136340164] [2022-01-31 19:35:29,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136340164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:29,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:29,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 19:35:29,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131727072] [2022-01-31 19:35:29,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:29,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 19:35:29,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:29,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 19:35:29,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=17253, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 19:35:29,629 INFO L87 Difference]: Start difference. First operand 187 states and 197 transitions. Second operand has 135 states, 135 states have (on average 1.348148148148148) internal successors, (182), 133 states have internal predecessors, (182), 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 19:36:17,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:17,394 INFO L93 Difference]: Finished difference Result 916 states and 988 transitions. [2022-01-31 19:36:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-01-31 19:36:17,395 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.348148148148148) internal successors, (182), 133 states have internal predecessors, (182), 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 186 [2022-01-31 19:36:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:17,397 INFO L225 Difference]: With dead ends: 916 [2022-01-31 19:36:17,397 INFO L226 Difference]: Without dead ends: 759 [2022-01-31 19:36:17,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 6 SyntacticMatches, 33 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35406 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=8355, Invalid=95651, Unknown=0, NotChecked=0, Total=104006 [2022-01-31 19:36:17,405 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 3513 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 17452 mSolverCounterSat, 7198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 24650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7198 IncrementalHoareTripleChecker+Valid, 17452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:17,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3513 Valid, 337 Invalid, 24650 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7198 Valid, 17452 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-01-31 19:36:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-31 19:36:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 464. [2022-01-31 19:36:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 459 states have (on average 1.0762527233115469) internal successors, (494), 459 states have internal predecessors, (494), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 498 transitions. [2022-01-31 19:36:17,587 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 498 transitions. Word has length 186 [2022-01-31 19:36:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:17,588 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 498 transitions. [2022-01-31 19:36:17,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.348148148148148) internal successors, (182), 133 states have internal predecessors, (182), 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 19:36:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 498 transitions. [2022-01-31 19:36:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:36:17,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:17,589 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:17,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:36:17,589 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1048838265, now seen corresponding path program 17 times [2022-01-31 19:36:17,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:17,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205778645] [2022-01-31 19:36:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:17,591 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:17,591 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:17,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:17,592 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:17,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:17,753 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 19:36:17,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:17,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205778645] [2022-01-31 19:36:17,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [205778645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:17,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:17,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:36:17,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550971746] [2022-01-31 19:36:17,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:17,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:36:17,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:17,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:36:17,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:36:17,754 INFO L87 Difference]: Start difference. First operand 464 states and 498 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:18,518 INFO L93 Difference]: Finished difference Result 777 states and 835 transitions. [2022-01-31 19:36:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:36:18,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-01-31 19:36:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:18,519 INFO L225 Difference]: With dead ends: 777 [2022-01-31 19:36:18,520 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 19:36:18,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:36:18,521 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 553 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:18,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 53 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:36:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 19:36:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 223. [2022-01-31 19:36:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.055045871559633) internal successors, (230), 218 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 234 transitions. [2022-01-31 19:36:18,621 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 234 transitions. Word has length 188 [2022-01-31 19:36:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:18,621 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 234 transitions. [2022-01-31 19:36:18,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 234 transitions. [2022-01-31 19:36:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 19:36:18,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:18,624 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:18,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:36:18,624 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash -580419081, now seen corresponding path program 18 times [2022-01-31 19:36:18,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:18,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098923935] [2022-01-31 19:36:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:18,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:18,626 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:18,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:18,627 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:18,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:18,804 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:18,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098923935] [2022-01-31 19:36:18,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1098923935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:18,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:18,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:36:18,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130198544] [2022-01-31 19:36:18,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:18,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:36:18,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:18,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:36:18,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:36:18,805 INFO L87 Difference]: Start difference. First operand 223 states and 234 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:19,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:19,529 INFO L93 Difference]: Finished difference Result 230 states and 241 transitions. [2022-01-31 19:36:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:36:19,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2022-01-31 19:36:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:19,530 INFO L225 Difference]: With dead ends: 230 [2022-01-31 19:36:19,530 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 19:36:19,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:36:19,531 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 351 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:19,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 69 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:36:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 19:36:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-01-31 19:36:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.053921568627451) internal successors, (215), 204 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 219 transitions. [2022-01-31 19:36:19,599 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 219 transitions. Word has length 204 [2022-01-31 19:36:19,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:19,599 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 219 transitions. [2022-01-31 19:36:19,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:19,599 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 219 transitions. [2022-01-31 19:36:19,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 19:36:19,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:19,600 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:19,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:36:19,600 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash 638499955, now seen corresponding path program 19 times [2022-01-31 19:36:19,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:19,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531023742] [2022-01-31 19:36:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:19,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:19,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:19,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:19,603 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:45,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:45,545 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 19:36:45,545 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531023742] [2022-01-31 19:36:45,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1531023742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:45,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:45,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2022-01-31 19:36:45,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606149686] [2022-01-31 19:36:45,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:45,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-01-31 19:36:45,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-01-31 19:36:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1404, Invalid=24036, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 19:36:45,548 INFO L87 Difference]: Start difference. First operand 209 states and 219 transitions. Second operand has 160 states, 160 states have (on average 1.275) internal successors, (204), 158 states have internal predecessors, (204), 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 19:37:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:18,083 INFO L93 Difference]: Finished difference Result 739 states and 779 transitions. [2022-01-31 19:37:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 19:37:18,083 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 1.275) internal successors, (204), 158 states have internal predecessors, (204), 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 208 [2022-01-31 19:37:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:18,085 INFO L225 Difference]: With dead ends: 739 [2022-01-31 19:37:18,085 INFO L226 Difference]: Without dead ends: 386 [2022-01-31 19:37:18,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 7 SyntacticMatches, 30 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28076 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=4447, Invalid=71453, Unknown=0, NotChecked=0, Total=75900 [2022-01-31 19:37:18,088 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 160 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 18026 mSolverCounterSat, 2889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 20915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2889 IncrementalHoareTripleChecker+Valid, 18026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:18,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 437 Invalid, 20915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2889 Valid, 18026 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2022-01-31 19:37:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-31 19:37:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 360. [2022-01-31 19:37:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.056338028169014) internal successors, (375), 355 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 379 transitions. [2022-01-31 19:37:18,225 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 379 transitions. Word has length 208 [2022-01-31 19:37:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:18,225 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 379 transitions. [2022-01-31 19:37:18,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 1.275) internal successors, (204), 158 states have internal predecessors, (204), 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 19:37:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 379 transitions. [2022-01-31 19:37:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 19:37:18,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:18,227 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:18,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:37:18,227 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash -950981329, now seen corresponding path program 20 times [2022-01-31 19:37:18,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991782121] [2022-01-31 19:37:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:18,229 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:18,229 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:18,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:18,230 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:18,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:18,444 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 19:37:18,444 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991782121] [2022-01-31 19:37:18,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [991782121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:18,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:18,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:37:18,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252769352] [2022-01-31 19:37:18,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:18,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:37:18,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:37:18,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:37:18,445 INFO L87 Difference]: Start difference. First operand 360 states and 379 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:19,212 INFO L93 Difference]: Finished difference Result 529 states and 565 transitions. [2022-01-31 19:37:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:37:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2022-01-31 19:37:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:19,213 INFO L225 Difference]: With dead ends: 529 [2022-01-31 19:37:19,213 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 19:37:19,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=1230, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:37:19,215 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 579 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:19,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 53 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:37:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 19:37:19,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-01-31 19:37:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0486725663716814) internal successors, (237), 226 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 241 transitions. [2022-01-31 19:37:19,302 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 241 transitions. Word has length 212 [2022-01-31 19:37:19,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:19,302 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 241 transitions. [2022-01-31 19:37:19,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 241 transitions. [2022-01-31 19:37:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 19:37:19,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:19,304 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:19,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:37:19,304 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash -550404547, now seen corresponding path program 21 times [2022-01-31 19:37:19,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:19,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837773664] [2022-01-31 19:37:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:19,307 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:19,307 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:19,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:19,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:54,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:54,028 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:54,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837773664] [2022-01-31 19:37:54,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [837773664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:54,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:54,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-01-31 19:37:54,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149568457] [2022-01-31 19:37:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:54,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-01-31 19:37:54,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-01-31 19:37:54,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1568, Invalid=26488, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 19:37:54,031 INFO L87 Difference]: Start difference. First operand 231 states and 241 transitions. Second operand has 168 states, 168 states have (on average 1.3452380952380953) internal successors, (226), 166 states have internal predecessors, (226), 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 19:38:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:50,785 INFO L93 Difference]: Finished difference Result 1143 states and 1208 transitions. [2022-01-31 19:38:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-31 19:38:50,786 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 1.3452380952380953) internal successors, (226), 166 states have internal predecessors, (226), 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 230 [2022-01-31 19:38:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:50,788 INFO L225 Difference]: With dead ends: 1143 [2022-01-31 19:38:50,788 INFO L226 Difference]: Without dead ends: 751 [2022-01-31 19:38:50,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 4 SyntacticMatches, 46 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35018 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=6812, Invalid=87130, Unknown=0, NotChecked=0, Total=93942 [2022-01-31 19:38:50,792 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1502 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 28768 mSolverCounterSat, 5420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 34188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5420 IncrementalHoareTripleChecker+Valid, 28768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:50,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 458 Invalid, 34188 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5420 Valid, 28768 Invalid, 0 Unknown, 0 Unchecked, 21.2s Time] [2022-01-31 19:38:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-31 19:38:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 520. [2022-01-31 19:38:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 515 states have (on average 1.0524271844660193) internal successors, (542), 515 states have internal predecessors, (542), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 546 transitions. [2022-01-31 19:38:51,025 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 546 transitions. Word has length 230 [2022-01-31 19:38:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:51,025 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 546 transitions. [2022-01-31 19:38:51,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 1.3452380952380953) internal successors, (226), 166 states have internal predecessors, (226), 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 19:38:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 546 transitions. [2022-01-31 19:38:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 19:38:51,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:51,027 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:51,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:38:51,027 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:51,027 INFO L85 PathProgramCache]: Analyzing trace with hash -205043207, now seen corresponding path program 22 times [2022-01-31 19:38:51,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:51,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946582447] [2022-01-31 19:38:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:51,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:51,029 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:51,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:51,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:51,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:51,236 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 19:38:51,237 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:51,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946582447] [2022-01-31 19:38:51,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946582447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:51,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:51,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:38:51,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254166653] [2022-01-31 19:38:51,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:51,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:38:51,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:51,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:38:51,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:38:51,238 INFO L87 Difference]: Start difference. First operand 520 states and 546 transitions. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 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 19:38:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:52,159 INFO L93 Difference]: Finished difference Result 703 states and 745 transitions. [2022-01-31 19:38:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:38:52,159 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 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 234 [2022-01-31 19:38:52,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:52,160 INFO L225 Difference]: With dead ends: 703 [2022-01-31 19:38:52,160 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 19:38:52,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=400, Invalid=1492, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:38:52,161 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 702 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:52,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 49 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:38:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 19:38:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-01-31 19:38:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0443548387096775) internal successors, (259), 248 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 263 transitions. [2022-01-31 19:38:52,314 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 263 transitions. Word has length 234 [2022-01-31 19:38:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:52,314 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 263 transitions. [2022-01-31 19:38:52,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 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 19:38:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 263 transitions. [2022-01-31 19:38:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-31 19:38:52,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:52,315 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:52,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:38:52,315 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash 325495943, now seen corresponding path program 23 times [2022-01-31 19:38:52,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:52,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732299646] [2022-01-31 19:38:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:52,317 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:52,317 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:52,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:52,318 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:35,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:35,639 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 19:39:35,639 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:35,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732299646] [2022-01-31 19:39:35,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [732299646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:35,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:35,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2022-01-31 19:39:35,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088855316] [2022-01-31 19:39:35,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:35,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-01-31 19:39:35,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:35,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-01-31 19:39:35,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1363, Invalid=27029, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 19:39:35,642 INFO L87 Difference]: Start difference. First operand 253 states and 263 transitions. Second operand has 169 states, 169 states have (on average 1.467455621301775) internal successors, (248), 167 states have internal predecessors, (248), 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 19:40:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:57,560 INFO L93 Difference]: Finished difference Result 891 states and 950 transitions. [2022-01-31 19:40:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-01-31 19:40:57,561 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 1.467455621301775) internal successors, (248), 167 states have internal predecessors, (248), 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 252 [2022-01-31 19:40:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:57,563 INFO L225 Difference]: With dead ends: 891 [2022-01-31 19:40:57,563 INFO L226 Difference]: Without dead ends: 883 [2022-01-31 19:40:57,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 7 SyntacticMatches, 64 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44940 ImplicationChecksByTransitivity, 83.7s TimeCoverageRelationStatistics Valid=14727, Invalid=122543, Unknown=0, NotChecked=0, Total=137270 [2022-01-31 19:40:57,568 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4730 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 26944 mSolverCounterSat, 9343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4730 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 36287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9343 IncrementalHoareTripleChecker+Valid, 26944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:57,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4730 Valid, 482 Invalid, 36287 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9343 Valid, 26944 Invalid, 0 Unknown, 0 Unchecked, 21.1s Time] [2022-01-31 19:40:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-31 19:40:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 470. [2022-01-31 19:40:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.060215053763441) internal successors, (493), 465 states have internal predecessors, (493), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 497 transitions. [2022-01-31 19:40:57,858 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 497 transitions. Word has length 252 [2022-01-31 19:40:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:57,858 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 497 transitions. [2022-01-31 19:40:57,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 1.467455621301775) internal successors, (248), 167 states have internal predecessors, (248), 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 19:40:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 497 transitions. [2022-01-31 19:40:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 19:40:57,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:57,859 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:57,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:40:57,860 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:57,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash 282330469, now seen corresponding path program 24 times [2022-01-31 19:40:57,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:57,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032122794] [2022-01-31 19:40:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:57,861 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:57,861 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:57,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:57,862 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:58,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:58,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032122794] [2022-01-31 19:40:58,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1032122794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:58,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:58,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:40:58,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233058022] [2022-01-31 19:40:58,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:58,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:40:58,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:58,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:40:58,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:40:58,094 INFO L87 Difference]: Start difference. First operand 470 states and 497 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 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 19:40:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:59,345 INFO L93 Difference]: Finished difference Result 933 states and 988 transitions. [2022-01-31 19:40:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:40:59,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 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 254 [2022-01-31 19:40:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:59,346 INFO L225 Difference]: With dead ends: 933 [2022-01-31 19:40:59,346 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 19:40:59,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:40:59,355 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 741 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:59,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 53 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:40:59,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 19:40:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 295. [2022-01-31 19:40:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.0413793103448277) internal successors, (302), 290 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 306 transitions. [2022-01-31 19:40:59,558 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 306 transitions. Word has length 254 [2022-01-31 19:40:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:59,558 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 306 transitions. [2022-01-31 19:40:59,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 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 19:40:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 306 transitions. [2022-01-31 19:40:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 19:40:59,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:59,559 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:59,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:40:59,560 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:59,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:59,560 INFO L85 PathProgramCache]: Analyzing trace with hash -677381163, now seen corresponding path program 25 times [2022-01-31 19:40:59,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:59,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693420859] [2022-01-31 19:40:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:59,561 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:59,561 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:59,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:59,562 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:59,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:59,797 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 19:40:59,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:59,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693420859] [2022-01-31 19:40:59,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693420859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:59,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:59,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:40:59,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300195159] [2022-01-31 19:40:59,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:59,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:40:59,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:59,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:40:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:40:59,798 INFO L87 Difference]: Start difference. First operand 295 states and 306 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 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 19:41:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:00,829 INFO L93 Difference]: Finished difference Result 302 states and 313 transitions. [2022-01-31 19:41:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:41:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 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 270 [2022-01-31 19:41:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:00,831 INFO L225 Difference]: With dead ends: 302 [2022-01-31 19:41:00,831 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 19:41:00,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=477, Invalid=1779, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:41:00,831 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 513 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:00,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 65 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:41:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 19:41:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-01-31 19:41:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0407407407407407) internal successors, (281), 270 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 285 transitions. [2022-01-31 19:41:00,989 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 285 transitions. Word has length 270 [2022-01-31 19:41:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:00,989 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 285 transitions. [2022-01-31 19:41:00,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 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 19:41:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 285 transitions. [2022-01-31 19:41:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-31 19:41:00,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:00,990 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:00,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:41:00,991 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash -276175023, now seen corresponding path program 26 times [2022-01-31 19:41:00,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270909519] [2022-01-31 19:41:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:00,992 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:00,992 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:00,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:00,993 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:57,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:57,269 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 19:41:57,270 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:57,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270909519] [2022-01-31 19:41:57,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1270909519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:57,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:57,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [202] imperfect sequences [] total 202 [2022-01-31 19:41:57,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535894488] [2022-01-31 19:41:57,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:57,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2022-01-31 19:41:57,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:57,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2022-01-31 19:41:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2153, Invalid=38449, Unknown=0, NotChecked=0, Total=40602 [2022-01-31 19:41:57,273 INFO L87 Difference]: Start difference. First operand 275 states and 285 transitions. Second operand has 202 states, 202 states have (on average 1.3366336633663367) internal successors, (270), 200 states have internal predecessors, (270), 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 19:43:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:24,603 INFO L93 Difference]: Finished difference Result 844 states and 888 transitions. [2022-01-31 19:43:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-01-31 19:43:24,603 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 1.3366336633663367) internal successors, (270), 200 states have internal predecessors, (270), 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 274 [2022-01-31 19:43:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:24,605 INFO L225 Difference]: With dead ends: 844 [2022-01-31 19:43:24,605 INFO L226 Difference]: Without dead ends: 838 [2022-01-31 19:43:24,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 4 SyntacticMatches, 56 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58357 ImplicationChecksByTransitivity, 90.8s TimeCoverageRelationStatistics Valid=14867, Invalid=145533, Unknown=0, NotChecked=0, Total=160400 [2022-01-31 19:43:24,612 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 2719 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 36040 mSolverCounterSat, 8933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2719 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 44973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8933 IncrementalHoareTripleChecker+Valid, 36040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:24,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2719 Valid, 470 Invalid, 44973 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8933 Valid, 36040 Invalid, 0 Unknown, 0 Unchecked, 28.1s Time] [2022-01-31 19:43:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-31 19:43:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 280. [2022-01-31 19:43:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.0436363636363637) internal successors, (287), 275 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 291 transitions. [2022-01-31 19:43:24,831 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 291 transitions. Word has length 274 [2022-01-31 19:43:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:24,832 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 291 transitions. [2022-01-31 19:43:24,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 1.3366336633663367) internal successors, (270), 200 states have internal predecessors, (270), 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 19:43:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 291 transitions. [2022-01-31 19:43:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-01-31 19:43:24,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:24,833 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:24,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:43:24,833 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1897117103, now seen corresponding path program 27 times [2022-01-31 19:43:24,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:24,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117212090] [2022-01-31 19:43:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:24,835 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:24,835 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:24,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:24,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:25,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:25,085 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 19:43:25,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117212090] [2022-01-31 19:43:25,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117212090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:25,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:25,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:43:25,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364386783] [2022-01-31 19:43:25,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:25,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:43:25,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:25,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:43:25,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:43:25,086 INFO L87 Difference]: Start difference. First operand 280 states and 291 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 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 19:43:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:26,589 INFO L93 Difference]: Finished difference Result 781 states and 820 transitions. [2022-01-31 19:43:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:43:26,589 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 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 276 [2022-01-31 19:43:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:26,590 INFO L225 Difference]: With dead ends: 781 [2022-01-31 19:43:26,590 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 19:43:26,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:43:26,591 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 735 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:26,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 59 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:43:26,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 19:43:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 295. [2022-01-31 19:43:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.0379310344827586) internal successors, (301), 290 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 305 transitions. [2022-01-31 19:43:26,815 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 305 transitions. Word has length 276 [2022-01-31 19:43:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:26,815 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 305 transitions. [2022-01-31 19:43:26,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 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 19:43:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 305 transitions. [2022-01-31 19:43:26,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-31 19:43:26,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:26,817 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:26,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:43:26,817 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:26,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:26,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1576946493, now seen corresponding path program 28 times [2022-01-31 19:43:26,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:26,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538395368] [2022-01-31 19:43:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:26,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:26,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:26,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:26,819 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:27,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:27,084 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 19:43:27,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:27,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538395368] [2022-01-31 19:43:27,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [538395368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:27,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:27,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:43:27,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68455704] [2022-01-31 19:43:27,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:27,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:43:27,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:43:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:43:27,087 INFO L87 Difference]: Start difference. First operand 295 states and 305 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 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 19:43:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:28,369 INFO L93 Difference]: Finished difference Result 302 states and 312 transitions. [2022-01-31 19:43:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:43:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 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 294 [2022-01-31 19:43:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:28,371 INFO L225 Difference]: With dead ends: 302 [2022-01-31 19:43:28,371 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 19:43:28,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=2091, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:43:28,372 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 539 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:28,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 69 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 2192 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:43:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 19:43:28,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2022-01-31 19:43:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0376712328767124) internal successors, (303), 292 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 307 transitions. [2022-01-31 19:43:28,611 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 307 transitions. Word has length 294 [2022-01-31 19:43:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:28,611 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 307 transitions. [2022-01-31 19:43:28,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 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 19:43:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 307 transitions. [2022-01-31 19:43:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-01-31 19:43:28,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:28,613 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:28,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:43:28,613 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:28,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:28,613 INFO L85 PathProgramCache]: Analyzing trace with hash 335466139, now seen corresponding path program 29 times [2022-01-31 19:43:28,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:28,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117431560] [2022-01-31 19:43:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:28,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:28,614 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:28,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:28,615 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:44,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:44,317 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 19:44:44,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:44,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117431560] [2022-01-31 19:44:44,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117431560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:44,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:44,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [201] imperfect sequences [] total 201 [2022-01-31 19:44:44,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154936537] [2022-01-31 19:44:44,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:44,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-01-31 19:44:44,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:44,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-01-31 19:44:44,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=38425, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 19:44:44,320 INFO L87 Difference]: Start difference. First operand 297 states and 307 transitions. Second operand has 201 states, 201 states have (on average 1.4527363184079602) internal successors, (292), 199 states have internal predecessors, (292), 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 19:45:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:37,164 INFO L93 Difference]: Finished difference Result 548 states and 567 transitions. [2022-01-31 19:45:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 19:45:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.4527363184079602) internal successors, (292), 199 states have internal predecessors, (292), 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 296 [2022-01-31 19:45:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:37,166 INFO L225 Difference]: With dead ends: 548 [2022-01-31 19:45:37,166 INFO L226 Difference]: Without dead ends: 543 [2022-01-31 19:45:37,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 4 SyntacticMatches, 78 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20570 ImplicationChecksByTransitivity, 81.7s TimeCoverageRelationStatistics Valid=4133, Invalid=83187, Unknown=0, NotChecked=0, Total=87320 [2022-01-31 19:45:37,169 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 26725 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 28430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 26725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:37,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 404 Invalid, 28430 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1705 Valid, 26725 Invalid, 0 Unknown, 0 Unchecked, 20.5s Time] [2022-01-31 19:45:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-31 19:45:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 510. [2022-01-31 19:45:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 505 states have (on average 1.0396039603960396) internal successors, (525), 505 states have internal predecessors, (525), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:37,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 529 transitions. [2022-01-31 19:45:37,608 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 529 transitions. Word has length 296 [2022-01-31 19:45:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:37,608 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 529 transitions. [2022-01-31 19:45:37,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.4527363184079602) internal successors, (292), 199 states have internal predecessors, (292), 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 19:45:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 529 transitions. [2022-01-31 19:45:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-31 19:45:37,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:37,610 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:37,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:45:37,610 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:37,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1587229817, now seen corresponding path program 30 times [2022-01-31 19:45:37,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:37,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428198761] [2022-01-31 19:45:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:37,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:37,612 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:37,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:37,613 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:37,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:37,893 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 19:45:37,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:37,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428198761] [2022-01-31 19:45:37,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [428198761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:37,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:37,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:45:37,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853586177] [2022-01-31 19:45:37,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:37,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:45:37,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:37,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:45:37,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:45:37,894 INFO L87 Difference]: Start difference. First operand 510 states and 529 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 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 19:45:39,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:39,744 INFO L93 Difference]: Finished difference Result 1044 states and 1090 transitions. [2022-01-31 19:45:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:45:39,744 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 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 298 [2022-01-31 19:45:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:39,745 INFO L225 Difference]: With dead ends: 1044 [2022-01-31 19:45:39,745 INFO L226 Difference]: Without dead ends: 543 [2022-01-31 19:45:39,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:45:39,747 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1041 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 1087 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 3027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1087 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:39,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1041 Valid, 65 Invalid, 3027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1087 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:45:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-31 19:45:40,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 525. [2022-01-31 19:45:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 520 states have (on average 1.0365384615384616) internal successors, (539), 520 states have internal predecessors, (539), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 543 transitions. [2022-01-31 19:45:40,228 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 543 transitions. Word has length 298 [2022-01-31 19:45:40,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:40,228 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 543 transitions. [2022-01-31 19:45:40,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 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 19:45:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 543 transitions. [2022-01-31 19:45:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-01-31 19:45:40,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:40,230 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:40,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:45:40,230 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:40,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1065489513, now seen corresponding path program 31 times [2022-01-31 19:45:40,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:40,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634736477] [2022-01-31 19:45:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:40,231 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:40,232 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:40,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:40,233 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:40,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:40,532 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 19:45:40,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:40,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634736477] [2022-01-31 19:45:40,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1634736477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:40,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:40,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:45:40,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446458730] [2022-01-31 19:45:40,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:40,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:45:40,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:40,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:45:40,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:45:40,533 INFO L87 Difference]: Start difference. First operand 525 states and 543 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 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 19:45:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:41,949 INFO L93 Difference]: Finished difference Result 532 states and 550 transitions. [2022-01-31 19:45:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:45:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 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 300 [2022-01-31 19:45:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:41,950 INFO L225 Difference]: With dead ends: 532 [2022-01-31 19:45:41,950 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 19:45:41,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=2428, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:45:41,951 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 850 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:41,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 71 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:45:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 19:45:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2022-01-31 19:45:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.035031847133758) internal successors, (325), 314 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 329 transitions. [2022-01-31 19:45:42,221 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 329 transitions. Word has length 300 [2022-01-31 19:45:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:42,221 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 329 transitions. [2022-01-31 19:45:42,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 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 19:45:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 329 transitions. [2022-01-31 19:45:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 19:45:42,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:42,222 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:42,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:45:42,223 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:42,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1051787877, now seen corresponding path program 32 times [2022-01-31 19:45:42,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:42,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821606669] [2022-01-31 19:45:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:42,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:42,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:42,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:42,225 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat