/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_const_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:40:17,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:40:17,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:40:18,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:40:18,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:40:18,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:40:18,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:40:18,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:40:18,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:40:18,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:40:18,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:40:18,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:40:18,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:40:18,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:40:18,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:40:18,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:40:18,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:40:18,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:40:18,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:40:18,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:40:18,099 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 19:40:18,121 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:40:18,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:40:18,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:40:18,122 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:40:18,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:40:18,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:40:18,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:40:18,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:40:18,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:40:18,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:40:18,122 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:40:18,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:40:18,122 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:40:18,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:40:18,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:40:18,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:40:18,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:40:18,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:40:18,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:40:18,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:40:18,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:40:18,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:40:18,123 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:40:18,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:40:18,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:40:18,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:40:18,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:40:18,419 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:40:18,425 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:40:18,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2022-01-31 19:40:18,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcaf2b4f0/a063f397e74d44a5a5dcf3ae188cc6fd/FLAGd1eed888d [2022-01-31 19:40:18,852 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:40:18,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c [2022-01-31 19:40:18,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcaf2b4f0/a063f397e74d44a5a5dcf3ae188cc6fd/FLAGd1eed888d [2022-01-31 19:40:18,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcaf2b4f0/a063f397e74d44a5a5dcf3ae188cc6fd [2022-01-31 19:40:18,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:40:18,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:40:18,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:40:18,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:40:18,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:40:18,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:40:18" (1/1) ... [2022-01-31 19:40:18,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724f612c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:18, skipping insertion in model container [2022-01-31 19:40:18,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:40:18" (1/1) ... [2022-01-31 19:40:18,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:40:18,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:40:19,051 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_const_m5.c[408,421] [2022-01-31 19:40:19,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:40:19,099 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:40:19,107 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_const_m5.c[408,421] [2022-01-31 19:40:19,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:40:19,123 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:40:19,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:19 WrapperNode [2022-01-31 19:40:19,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:40:19,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:40:19,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:40:19,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:40:19,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:19" (1/1) ... [2022-01-31 19:40:19,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:19" (1/1) ... [2022-01-31 19:40:19,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:19" (1/1) ... [2022-01-31 19:40:19,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:19" (1/1) ... [2022-01-31 19:40:19,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:19" (1/1) ... [2022-01-31 19:40:19,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:19" (1/1) ... [2022-01-31 19:40:19,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:19" (1/1) ... [2022-01-31 19:40:19,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:40:19,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:40:19,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:40:19,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:40:19,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:19" (1/1) ... [2022-01-31 19:40:19,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:40:19,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:40:19,202 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 19:40:19,236 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 19:40:19,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:40:19,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:40:19,255 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:40:19,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:40:19,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:40:19,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:40:19,256 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:40:19,256 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:40:19,256 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:40:19,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:40:19,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:40:19,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:40:19,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 19:40:19,257 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 19:40:19,258 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:40:19,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 19:40:19,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:40:19,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:40:19,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:40:19,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:40:19,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:40:19,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:40:19,337 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:40:19,338 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:40:19,512 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:40:19,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:40:19,516 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-01-31 19:40:19,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:40:19 BoogieIcfgContainer [2022-01-31 19:40:19,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:40:19,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:40:19,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:40:19,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:40:19,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:40:18" (1/3) ... [2022-01-31 19:40:19,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5876a072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:40:19, skipping insertion in model container [2022-01-31 19:40:19,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:19" (2/3) ... [2022-01-31 19:40:19,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5876a072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:40:19, skipping insertion in model container [2022-01-31 19:40:19,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:40:19" (3/3) ... [2022-01-31 19:40:19,523 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2022-01-31 19:40:19,527 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:40:19,527 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:40:19,558 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:40:19,563 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 19:40:19,563 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:40:19,574 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 19:40:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 19:40:19,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:19,582 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 19:40:19,583 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:19,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1546601285, now seen corresponding path program 1 times [2022-01-31 19:40:19,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:19,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163372026] [2022-01-31 19:40:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:19,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:19,639 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:19,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:19,784 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 19:40:19,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:19,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163372026] [2022-01-31 19:40:19,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163372026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:19,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:19,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:40:19,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217664218] [2022-01-31 19:40:19,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:19,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:40:19,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:19,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:40:19,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:40:19,828 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 19:40:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:19,973 INFO L93 Difference]: Finished difference Result 95 states and 141 transitions. [2022-01-31 19:40:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:40:19,974 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 19:40:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:19,978 INFO L225 Difference]: With dead ends: 95 [2022-01-31 19:40:19,978 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 19:40:19,980 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 19:40:19,982 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 19:40:19,983 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 19:40:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 19:40:20,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-01-31 19:40:20,005 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 19:40:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-01-31 19:40:20,007 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 32 [2022-01-31 19:40:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:20,007 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-01-31 19:40:20,007 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 19:40:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-01-31 19:40:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 19:40:20,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:20,008 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 19:40:20,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:40:20,009 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:20,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1769864063, now seen corresponding path program 1 times [2022-01-31 19:40:20,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:20,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280292214] [2022-01-31 19:40:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:20,026 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:20,026 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:20,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:20,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:20,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:20,097 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 19:40:20,097 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:20,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280292214] [2022-01-31 19:40:20,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280292214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:20,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:20,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:40:20,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505597237] [2022-01-31 19:40:20,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:20,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:40:20,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:40:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:40:20,100 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 19:40:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:20,341 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2022-01-31 19:40:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:40:20,343 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 19:40:20,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:20,344 INFO L225 Difference]: With dead ends: 98 [2022-01-31 19:40:20,344 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 19:40:20,344 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 19:40:20,345 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:20,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 27 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:40:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 19:40:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-01-31 19:40:20,355 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 19:40:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-01-31 19:40:20,356 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 34 [2022-01-31 19:40:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:20,356 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-01-31 19:40:20,356 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 19:40:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-01-31 19:40:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:40:20,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:20,358 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 19:40:20,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:40:20,358 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash -845230611, now seen corresponding path program 1 times [2022-01-31 19:40:20,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:20,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448821461] [2022-01-31 19:40:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:20,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:20,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:20,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:20,369 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:20,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:20,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448821461] [2022-01-31 19:40:20,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [448821461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:20,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:20,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:40:20,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474023316] [2022-01-31 19:40:20,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:20,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:40:20,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:20,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:40:20,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:40:20,551 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 19:40:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:20,695 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2022-01-31 19:40:20,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:40:20,696 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 19:40:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:20,699 INFO L225 Difference]: With dead ends: 102 [2022-01-31 19:40:20,699 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 19:40:20,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:40:20,705 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 19:40:20,715 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 19:40:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 19:40:20,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 19:40:20,725 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 19:40:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-31 19:40:20,726 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2022-01-31 19:40:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:20,727 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-31 19:40:20,727 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 19:40:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-31 19:40:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 19:40:20,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:20,728 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 19:40:20,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:40:20,728 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:20,729 INFO L85 PathProgramCache]: Analyzing trace with hash 312682443, now seen corresponding path program 2 times [2022-01-31 19:40:20,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:20,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555887664] [2022-01-31 19:40:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:20,730 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:20,730 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:20,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:20,731 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:20,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:20,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:20,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555887664] [2022-01-31 19:40:20,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555887664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:20,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:20,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:40:20,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482133754] [2022-01-31 19:40:20,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:20,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:40:20,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:20,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:40:20,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:40:20,913 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 19:40:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:21,089 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2022-01-31 19:40:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:40:21,090 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 19:40:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:21,090 INFO L225 Difference]: With dead ends: 118 [2022-01-31 19:40:21,090 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 19:40:21,091 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 19:40:21,091 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 19:40:21,092 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 19:40:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 19:40:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-31 19:40:21,124 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 19:40:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-01-31 19:40:21,125 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2022-01-31 19:40:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:21,126 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-01-31 19:40:21,126 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 19:40:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-01-31 19:40:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 19:40:21,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:21,128 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 19:40:21,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:40:21,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:21,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1666836425, now seen corresponding path program 3 times [2022-01-31 19:40:21,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:21,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444427739] [2022-01-31 19:40:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:21,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:21,139 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:21,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:21,140 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:24,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:24,379 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 19:40:24,379 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:24,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444427739] [2022-01-31 19:40:24,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444427739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:24,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:24,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:40:24,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111336904] [2022-01-31 19:40:24,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:24,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:40:24,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:24,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:40:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1962, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:40:24,386 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 44 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 19:40:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:26,291 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2022-01-31 19:40:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:40:26,293 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 44 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 19:40:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:26,294 INFO L225 Difference]: With dead ends: 139 [2022-01-31 19:40:26,294 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 19:40:26,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 7 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=118, Invalid=2138, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:40:26,295 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 2913 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:26,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 393 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2913 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 19:40:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 19:40:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2022-01-31 19:40:26,318 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 19:40:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2022-01-31 19:40:26,338 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2022-01-31 19:40:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:26,339 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2022-01-31 19:40:26,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 44 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 19:40:26,339 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2022-01-31 19:40:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 19:40:26,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:26,346 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 19:40:26,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:40:26,346 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash 146081557, now seen corresponding path program 4 times [2022-01-31 19:40:26,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:26,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793873741] [2022-01-31 19:40:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:26,349 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:26,349 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:26,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:26,350 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:26,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:26,474 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:26,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793873741] [2022-01-31 19:40:26,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793873741] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:26,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:26,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:40:26,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464393133] [2022-01-31 19:40:26,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:26,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:40:26,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:26,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:40:26,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:40:26,476 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 19:40:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:26,924 INFO L93 Difference]: Finished difference Result 284 states and 330 transitions. [2022-01-31 19:40:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:40:26,924 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 19:40:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:26,927 INFO L225 Difference]: With dead ends: 284 [2022-01-31 19:40:26,927 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 19:40:26,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:40:26,932 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:26,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 43 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:40:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 19:40:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 145. [2022-01-31 19:40:26,977 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 19:40:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2022-01-31 19:40:26,978 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 78 [2022-01-31 19:40:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:26,978 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2022-01-31 19:40:26,978 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 19:40:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2022-01-31 19:40:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 19:40:26,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:26,984 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 19:40:26,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:40:26,984 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:26,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1096972493, now seen corresponding path program 5 times [2022-01-31 19:40:26,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:26,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025670401] [2022-01-31 19:40:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:26,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:26,986 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:26,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:26,987 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:27,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:27,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:27,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025670401] [2022-01-31 19:40:27,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025670401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:27,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:27,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:40:27,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784462203] [2022-01-31 19:40:27,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:27,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:40:27,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:27,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:40:27,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:40:27,066 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 19:40:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:27,372 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2022-01-31 19:40:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:40:27,373 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 19:40:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:27,374 INFO L225 Difference]: With dead ends: 152 [2022-01-31 19:40:27,374 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 19:40:27,374 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 19:40:27,376 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 184 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:27,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 47 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:40:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 19:40:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-01-31 19:40:27,391 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 19:40:27,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2022-01-31 19:40:27,392 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2022-01-31 19:40:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:27,392 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2022-01-31 19:40:27,392 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 19:40:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2022-01-31 19:40:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 19:40:27,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:27,393 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 19:40:27,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:40:27,393 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:27,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:27,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2019660031, now seen corresponding path program 6 times [2022-01-31 19:40:27,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:27,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744520998] [2022-01-31 19:40:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:27,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:27,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:27,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:27,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:32,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:32,937 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 19:40:32,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:32,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744520998] [2022-01-31 19:40:32,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744520998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:32,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:32,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 19:40:32,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936339452] [2022-01-31 19:40:32,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:32,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 19:40:32,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:32,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 19:40:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=6372, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:40:32,940 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 82 states, 82 states have (on average 1.146341463414634) internal successors, (94), 80 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 19:40:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:39,630 INFO L93 Difference]: Finished difference Result 188 states and 207 transitions. [2022-01-31 19:40:39,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 19:40:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.146341463414634) internal successors, (94), 80 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 19:40:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:39,632 INFO L225 Difference]: With dead ends: 188 [2022-01-31 19:40:39,632 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 19:40:39,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=780, Invalid=17042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 19:40:39,636 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 4906 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 5086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:39,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 5086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 4906 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 19:40:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 19:40:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 168. [2022-01-31 19:40:39,657 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 19:40:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 187 transitions. [2022-01-31 19:40:39,658 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 187 transitions. Word has length 98 [2022-01-31 19:40:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:39,658 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 187 transitions. [2022-01-31 19:40:39,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.146341463414634) internal successors, (94), 80 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 19:40:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 187 transitions. [2022-01-31 19:40:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 19:40:39,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:39,665 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 19:40:39,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:40:39,665 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:39,665 INFO L85 PathProgramCache]: Analyzing trace with hash -781937825, now seen corresponding path program 7 times [2022-01-31 19:40:39,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:39,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882959585] [2022-01-31 19:40:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:39,668 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:39,668 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:39,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:39,669 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:39,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:39,745 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 19:40:39,745 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:39,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882959585] [2022-01-31 19:40:39,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1882959585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:39,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:39,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:40:39,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199206100] [2022-01-31 19:40:39,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:39,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:40:39,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:39,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:40:39,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:40:39,747 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 19:40:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:40,109 INFO L93 Difference]: Finished difference Result 360 states and 406 transitions. [2022-01-31 19:40:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:40:40,109 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 19:40:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:40,110 INFO L225 Difference]: With dead ends: 360 [2022-01-31 19:40:40,110 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 19:40:40,111 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 19:40:40,111 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 199 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:40,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 61 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:40:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 19:40:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2022-01-31 19:40:40,131 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 19:40:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 201 transitions. [2022-01-31 19:40:40,131 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 201 transitions. Word has length 100 [2022-01-31 19:40:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:40,132 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 201 transitions. [2022-01-31 19:40:40,132 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 19:40:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 201 transitions. [2022-01-31 19:40:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:40:40,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:40,132 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 19:40:40,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:40:40,133 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:40,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1327442173, now seen corresponding path program 8 times [2022-01-31 19:40:40,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:40,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091604083] [2022-01-31 19:40:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:40,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:40,135 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:40,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:40,135 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:40,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:40,219 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 19:40:40,219 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091604083] [2022-01-31 19:40:40,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091604083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:40,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:40,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:40:40,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698768069] [2022-01-31 19:40:40,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:40,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:40:40,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:40:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:40:40,221 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 19:40:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:40,559 INFO L93 Difference]: Finished difference Result 190 states and 208 transitions. [2022-01-31 19:40:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:40:40,560 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 19:40:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:40,561 INFO L225 Difference]: With dead ends: 190 [2022-01-31 19:40:40,561 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:40:40,561 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 19:40:40,561 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 245 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:40,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 51 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:40:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:40:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-01-31 19:40:40,574 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 19:40:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2022-01-31 19:40:40,574 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 102 [2022-01-31 19:40:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:40,575 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2022-01-31 19:40:40,575 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 19:40:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2022-01-31 19:40:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:40:40,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:40,576 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 19:40:40,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:40:40,576 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:40,576 INFO L85 PathProgramCache]: Analyzing trace with hash 715878987, now seen corresponding path program 9 times [2022-01-31 19:40:40,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:40,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000473694] [2022-01-31 19:40:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:40,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:40,578 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:40,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:40,579 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:48,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:48,121 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 19:40:48,121 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000473694] [2022-01-31 19:40:48,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000473694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:48,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:48,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 19:40:48,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034665586] [2022-01-31 19:40:48,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:48,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 19:40:48,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 19:40:48,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=9809, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 19:40:48,125 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 102 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 100 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 19:40:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:58,126 INFO L93 Difference]: Finished difference Result 330 states and 360 transitions. [2022-01-31 19:40:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 19:40:58,127 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 100 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 19:40:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:58,128 INFO L225 Difference]: With dead ends: 330 [2022-01-31 19:40:58,128 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 19:40:58,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10896 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1471, Invalid=32569, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 19:40:58,134 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 6413 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 6870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 6413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:58,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 410 Invalid, 6870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 6413 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 19:40:58,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 19:40:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 216. [2022-01-31 19:40:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.085308056872038) internal successors, (229), 211 states have internal predecessors, (229), 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 19:40:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 233 transitions. [2022-01-31 19:40:58,164 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 233 transitions. Word has length 120 [2022-01-31 19:40:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:58,164 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 233 transitions. [2022-01-31 19:40:58,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 100 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 19:40:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 233 transitions. [2022-01-31 19:40:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:40:58,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:58,166 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 19:40:58,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:40:58,166 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1778281001, now seen corresponding path program 10 times [2022-01-31 19:40:58,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:58,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964609184] [2022-01-31 19:40:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:58,168 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:58,168 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:58,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:58,169 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:58,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:58,267 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:58,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964609184] [2022-01-31 19:40:58,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [964609184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:58,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:58,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:40:58,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605920905] [2022-01-31 19:40:58,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:58,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:40:58,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:40:58,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:40:58,269 INFO L87 Difference]: Start difference. First operand 216 states and 233 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 19:40:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:58,750 INFO L93 Difference]: Finished difference Result 436 states and 479 transitions. [2022-01-31 19:40:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:40:58,751 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 19:40:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:58,752 INFO L225 Difference]: With dead ends: 436 [2022-01-31 19:40:58,752 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 19:40:58,752 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 19:40:58,753 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 252 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:58,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 51 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:40:58,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 19:40:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 231. [2022-01-31 19:40:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0884955752212389) internal successors, (246), 226 states have internal predecessors, (246), 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 19:40:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 250 transitions. [2022-01-31 19:40:58,780 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 250 transitions. Word has length 122 [2022-01-31 19:40:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:58,780 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 250 transitions. [2022-01-31 19:40:58,780 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 19:40:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 250 transitions. [2022-01-31 19:40:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:40:58,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:58,782 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 19:40:58,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:40:58,782 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:58,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:58,782 INFO L85 PathProgramCache]: Analyzing trace with hash -193012567, now seen corresponding path program 11 times [2022-01-31 19:40:58,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:58,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612033737] [2022-01-31 19:40:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:58,784 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:58,784 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:58,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:58,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:58,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:58,883 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 19:40:58,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:58,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612033737] [2022-01-31 19:40:58,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [612033737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:58,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:58,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:40:58,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873526950] [2022-01-31 19:40:58,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:58,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:40:58,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:40:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:40:58,884 INFO L87 Difference]: Start difference. First operand 231 states and 250 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 19:40:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:59,360 INFO L93 Difference]: Finished difference Result 238 states and 257 transitions. [2022-01-31 19:40:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:40:59,360 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 19:40:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:59,361 INFO L225 Difference]: With dead ends: 238 [2022-01-31 19:40:59,361 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 19:40:59,361 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 19:40:59,362 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 233 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:59,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 61 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:40:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 19:40:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-01-31 19:40:59,380 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 19:40:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2022-01-31 19:40:59,380 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 122 [2022-01-31 19:40:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:59,381 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2022-01-31 19:40:59,381 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 19:40:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2022-01-31 19:40:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:40:59,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:59,382 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 19:40:59,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:40:59,383 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:59,383 INFO L85 PathProgramCache]: Analyzing trace with hash -277298667, now seen corresponding path program 12 times [2022-01-31 19:40:59,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:59,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508103309] [2022-01-31 19:40:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:59,387 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:59,387 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:59,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:59,388 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:13,250 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 19:41:13,251 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:13,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508103309] [2022-01-31 19:41:13,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508103309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:13,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:13,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 19:41:13,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447750826] [2022-01-31 19:41:13,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:13,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 19:41:13,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 19:41:13,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=15146, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 19:41:13,253 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 126 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 124 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 19:41:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:37,592 INFO L93 Difference]: Finished difference Result 282 states and 306 transitions. [2022-01-31 19:41:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 19:41:37,592 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 124 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 19:41:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:37,601 INFO L225 Difference]: With dead ends: 282 [2022-01-31 19:41:37,602 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 19:41:37,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12670 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=2855, Invalid=55467, Unknown=0, NotChecked=0, Total=58322 [2022-01-31 19:41:37,622 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 11346 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 12005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 11346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:37,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 481 Invalid, 12005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 11346 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-01-31 19:41:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 19:41:37,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 244. [2022-01-31 19:41:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0836820083682008) internal successors, (259), 239 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 19:41:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 263 transitions. [2022-01-31 19:41:37,680 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 263 transitions. Word has length 142 [2022-01-31 19:41:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:37,680 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 263 transitions. [2022-01-31 19:41:37,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 124 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 19:41:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 263 transitions. [2022-01-31 19:41:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 19:41:37,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:37,681 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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 19:41:37,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:41:37,681 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash 6943091, now seen corresponding path program 13 times [2022-01-31 19:41:37,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:37,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857143018] [2022-01-31 19:41:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:37,683 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:37,683 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:37,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:37,684 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:37,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:37,786 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 19:41:37,786 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:37,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857143018] [2022-01-31 19:41:37,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857143018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:37,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:37,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:41:37,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480394259] [2022-01-31 19:41:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:37,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:41:37,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:41:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:41:37,787 INFO L87 Difference]: Start difference. First operand 244 states and 263 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 19:41:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:38,310 INFO L93 Difference]: Finished difference Result 512 states and 558 transitions. [2022-01-31 19:41:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:41:38,310 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 144 [2022-01-31 19:41:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:38,311 INFO L225 Difference]: With dead ends: 512 [2022-01-31 19:41:38,311 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 19:41:38,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:41:38,314 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 397 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:38,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 53 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:41:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 19:41:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 259. [2022-01-31 19:41:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0748031496062993) internal successors, (273), 254 states have internal predecessors, (273), 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 19:41:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 277 transitions. [2022-01-31 19:41:38,357 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 277 transitions. Word has length 144 [2022-01-31 19:41:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:38,357 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 277 transitions. [2022-01-31 19:41:38,358 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 19:41:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 277 transitions. [2022-01-31 19:41:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 19:41:38,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:38,359 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 19:41:38,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:41:38,359 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:38,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1960488431, now seen corresponding path program 14 times [2022-01-31 19:41:38,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:38,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914150442] [2022-01-31 19:41:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:38,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:38,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:38,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:38,363 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:38,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:38,479 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 19:41:38,479 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914150442] [2022-01-31 19:41:38,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1914150442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:38,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:38,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:41:38,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750818220] [2022-01-31 19:41:38,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:38,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:41:38,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:38,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:41:38,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:41:38,480 INFO L87 Difference]: Start difference. First operand 259 states and 277 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 19:41:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:39,019 INFO L93 Difference]: Finished difference Result 266 states and 284 transitions. [2022-01-31 19:41:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:41:39,019 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 19:41:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:39,023 INFO L225 Difference]: With dead ends: 266 [2022-01-31 19:41:39,023 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 19:41:39,024 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 19:41:39,024 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 265 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:39,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 67 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:41:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 19:41:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-01-31 19:41:39,067 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 19:41:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2022-01-31 19:41:39,068 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 146 [2022-01-31 19:41:39,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:39,068 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2022-01-31 19:41:39,068 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 19:41:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2022-01-31 19:41:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:41:39,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:39,069 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 19:41:39,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:41:39,070 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:39,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash 926547551, now seen corresponding path program 15 times [2022-01-31 19:41:39,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:39,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087088812] [2022-01-31 19:41:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:39,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:39,071 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:39,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:39,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:54,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:54,850 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:54,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087088812] [2022-01-31 19:41:54,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087088812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:54,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:54,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 19:41:54,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296702777] [2022-01-31 19:41:54,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:54,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 19:41:54,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 19:41:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=19557, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 19:41:54,852 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand has 144 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 142 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 19:42:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:30,447 INFO L93 Difference]: Finished difference Result 748 states and 813 transitions. [2022-01-31 19:42:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2022-01-31 19:42:30,448 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 142 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 19:42:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:30,450 INFO L225 Difference]: With dead ends: 748 [2022-01-31 19:42:30,450 INFO L226 Difference]: Without dead ends: 684 [2022-01-31 19:42:30,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36049 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=7211, Invalid=94869, Unknown=0, NotChecked=0, Total=102080 [2022-01-31 19:42:30,454 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1360 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 17360 mSolverCounterSat, 3638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 20998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3638 IncrementalHoareTripleChecker+Valid, 17360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:30,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1360 Valid, 511 Invalid, 20998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3638 Valid, 17360 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-01-31 19:42:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-31 19:42:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 531. [2022-01-31 19:42:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 526 states have (on average 1.0836501901140685) internal successors, (570), 526 states have internal predecessors, (570), 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 19:42:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 574 transitions. [2022-01-31 19:42:30,605 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 574 transitions. Word has length 164 [2022-01-31 19:42:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:30,605 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 574 transitions. [2022-01-31 19:42:30,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 142 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 19:42:30,606 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 574 transitions. [2022-01-31 19:42:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 19:42:30,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:30,607 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 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 19:42:30,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:42:30,607 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:30,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1927659203, now seen corresponding path program 16 times [2022-01-31 19:42:30,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:30,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324483882] [2022-01-31 19:42:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:30,608 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:30,609 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:30,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:30,610 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:30,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:30,774 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 19:42:30,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:30,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324483882] [2022-01-31 19:42:30,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324483882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:30,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:30,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:42:30,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89547175] [2022-01-31 19:42:30,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:30,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:42:30,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:42:30,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:42:30,776 INFO L87 Difference]: Start difference. First operand 531 states and 574 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 19:42:31,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:31,404 INFO L93 Difference]: Finished difference Result 854 states and 925 transitions. [2022-01-31 19:42:31,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:42:31,404 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 166 [2022-01-31 19:42:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:31,406 INFO L225 Difference]: With dead ends: 854 [2022-01-31 19:42:31,406 INFO L226 Difference]: Without dead ends: 329 [2022-01-31 19:42:31,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:42:31,407 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 328 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:31,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 67 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:42:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-31 19:42:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 311. [2022-01-31 19:42:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.065359477124183) internal successors, (326), 306 states have internal predecessors, (326), 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 19:42:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 330 transitions. [2022-01-31 19:42:31,506 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 330 transitions. Word has length 166 [2022-01-31 19:42:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:31,506 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 330 transitions. [2022-01-31 19:42:31,506 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 19:42:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 330 transitions. [2022-01-31 19:42:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 19:42:31,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:31,507 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 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 19:42:31,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:42:31,507 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:31,507 INFO L85 PathProgramCache]: Analyzing trace with hash 673043389, now seen corresponding path program 17 times [2022-01-31 19:42:31,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:31,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119509899] [2022-01-31 19:42:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:31,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:31,509 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:31,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:31,510 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:31,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:31,649 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 19:42:31,649 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:31,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119509899] [2022-01-31 19:42:31,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119509899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:31,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:31,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:42:31,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332714852] [2022-01-31 19:42:31,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:31,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:42:31,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:31,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:42:31,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:42:31,651 INFO L87 Difference]: Start difference. First operand 311 states and 330 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 19:42:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:32,404 INFO L93 Difference]: Finished difference Result 318 states and 337 transitions. [2022-01-31 19:42:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:42:32,404 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 166 [2022-01-31 19:42:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:32,405 INFO L225 Difference]: With dead ends: 318 [2022-01-31 19:42:32,405 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 19:42:32,405 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 19:42:32,406 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 358 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:32,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 57 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:42:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 19:42:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-01-31 19:42:32,463 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 19:42:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 197 transitions. [2022-01-31 19:42:32,464 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 197 transitions. Word has length 166 [2022-01-31 19:42:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:32,464 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 197 transitions. [2022-01-31 19:42:32,464 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 19:42:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 197 transitions. [2022-01-31 19:42:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 19:42:32,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:32,465 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 19:42:32,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:42:32,465 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:32,465 INFO L85 PathProgramCache]: Analyzing trace with hash 78300969, now seen corresponding path program 18 times [2022-01-31 19:42:32,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:32,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602143931] [2022-01-31 19:42:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:32,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:32,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:32,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:32,467 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:55,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:55,230 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 19:42:55,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602143931] [2022-01-31 19:42:55,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602143931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:55,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:55,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2022-01-31 19:42:55,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648039100] [2022-01-31 19:42:55,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:55,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-01-31 19:42:55,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:55,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-01-31 19:42:55,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=27204, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 19:42:55,233 INFO L87 Difference]: Start difference. First operand 187 states and 197 transitions. Second operand has 169 states, 169 states have (on average 1.0769230769230769) internal successors, (182), 167 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 19:44:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:02,252 INFO L93 Difference]: Finished difference Result 642 states and 681 transitions. [2022-01-31 19:44:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2022-01-31 19:44:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 1.0769230769230769) internal successors, (182), 167 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 19:44:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:02,254 INFO L225 Difference]: With dead ends: 642 [2022-01-31 19:44:02,254 INFO L226 Difference]: Without dead ends: 503 [2022-01-31 19:44:02,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37757 ImplicationChecksByTransitivity, 60.7s TimeCoverageRelationStatistics Valid=5698, Invalid=115058, Unknown=0, NotChecked=0, Total=120756 [2022-01-31 19:44:02,258 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 203 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 27142 mSolverCounterSat, 1778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 28920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1778 IncrementalHoareTripleChecker+Valid, 27142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:02,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 534 Invalid, 28920 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1778 Valid, 27142 Invalid, 0 Unknown, 0 Unchecked, 21.6s Time] [2022-01-31 19:44:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-31 19:44:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 402. [2022-01-31 19:44:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 397 states have (on average 1.0503778337531486) internal successors, (417), 397 states have internal predecessors, (417), 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 19:44:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 421 transitions. [2022-01-31 19:44:02,495 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 421 transitions. Word has length 186 [2022-01-31 19:44:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:02,495 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 421 transitions. [2022-01-31 19:44:02,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 1.0769230769230769) internal successors, (182), 167 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 19:44:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 421 transitions. [2022-01-31 19:44:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:44:02,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:02,496 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 19:44:02,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:44:02,496 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:02,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1048838265, now seen corresponding path program 19 times [2022-01-31 19:44:02,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:02,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081982400] [2022-01-31 19:44:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:02,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:02,498 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:02,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:02,499 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:02,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:02,739 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 19:44:02,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081982400] [2022-01-31 19:44:02,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081982400] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:02,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:02,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:44:02,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935309814] [2022-01-31 19:44:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:02,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:44:02,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:44:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:44:02,741 INFO L87 Difference]: Start difference. First operand 402 states and 421 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 19:44:03,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:03,653 INFO L93 Difference]: Finished difference Result 797 states and 846 transitions. [2022-01-31 19:44:03,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:44:03,653 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 19:44:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:03,654 INFO L225 Difference]: With dead ends: 797 [2022-01-31 19:44:03,654 INFO L226 Difference]: Without dead ends: 369 [2022-01-31 19:44:03,655 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 19:44:03,656 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 538 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:03,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 51 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:44:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-31 19:44:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 351. [2022-01-31 19:44:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.0578034682080926) internal successors, (366), 346 states have internal predecessors, (366), 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 19:44:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 370 transitions. [2022-01-31 19:44:03,784 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 370 transitions. Word has length 188 [2022-01-31 19:44:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:03,785 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 370 transitions. [2022-01-31 19:44:03,785 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 19:44:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 370 transitions. [2022-01-31 19:44:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:44:03,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:03,786 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 19:44:03,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:44:03,786 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:03,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1543971335, now seen corresponding path program 20 times [2022-01-31 19:44:03,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:03,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263683852] [2022-01-31 19:44:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:03,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:03,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:03,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:03,788 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:03,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:03,970 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:03,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263683852] [2022-01-31 19:44:03,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263683852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:03,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:03,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:44:03,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528238804] [2022-01-31 19:44:03,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:03,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:44:03,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:03,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:44:03,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:44:03,971 INFO L87 Difference]: Start difference. First operand 351 states and 370 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 19:44:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:04,860 INFO L93 Difference]: Finished difference Result 358 states and 377 transitions. [2022-01-31 19:44:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:44:04,862 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 19:44:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:04,863 INFO L225 Difference]: With dead ends: 358 [2022-01-31 19:44:04,863 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 19:44:04,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:44:04,865 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 389 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:04,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 69 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:44:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 19:44:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-01-31 19:44:04,942 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 19:44:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 219 transitions. [2022-01-31 19:44:04,943 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 219 transitions. Word has length 188 [2022-01-31 19:44:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:04,943 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 219 transitions. [2022-01-31 19:44:04,943 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 19:44:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 219 transitions. [2022-01-31 19:44:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 19:44:04,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:04,944 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 19:44:04,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:44:04,945 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:04,945 INFO L85 PathProgramCache]: Analyzing trace with hash 638499955, now seen corresponding path program 21 times [2022-01-31 19:44:04,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:04,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418362486] [2022-01-31 19:44:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:04,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:04,946 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:04,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:04,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:45,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:45,595 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 19:44:45,595 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:45,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418362486] [2022-01-31 19:44:45,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [418362486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:45,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:45,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [192] imperfect sequences [] total 192 [2022-01-31 19:44:45,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264163337] [2022-01-31 19:44:45,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:45,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-01-31 19:44:45,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:45,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-01-31 19:44:45,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1348, Invalid=35324, Unknown=0, NotChecked=0, Total=36672 [2022-01-31 19:44:45,598 INFO L87 Difference]: Start difference. First operand 209 states and 219 transitions. Second operand has 192 states, 192 states have (on average 1.0625) internal successors, (204), 190 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 19:45:36,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 19:47:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:18,198 INFO L93 Difference]: Finished difference Result 952 states and 1013 transitions. [2022-01-31 19:47:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2022-01-31 19:47:18,199 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0625) internal successors, (204), 190 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 19:47:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:18,201 INFO L225 Difference]: With dead ends: 952 [2022-01-31 19:47:18,201 INFO L226 Difference]: Without dead ends: 633 [2022-01-31 19:47:18,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39639 ImplicationChecksByTransitivity, 126.6s TimeCoverageRelationStatistics Valid=8386, Invalid=142546, Unknown=0, NotChecked=0, Total=150932 [2022-01-31 19:47:18,208 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1465 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 53518 mSolverCounterSat, 6397 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 59916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6397 IncrementalHoareTripleChecker+Valid, 53518 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:18,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 1084 Invalid, 59916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6397 Valid, 53518 Invalid, 1 Unknown, 0 Unchecked, 52.7s Time] [2022-01-31 19:47:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-31 19:47:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 515. [2022-01-31 19:47:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.0529411764705883) internal successors, (537), 510 states have internal predecessors, (537), 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 19:47:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 541 transitions. [2022-01-31 19:47:18,494 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 541 transitions. Word has length 208 [2022-01-31 19:47:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:18,494 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 541 transitions. [2022-01-31 19:47:18,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0625) internal successors, (204), 190 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 19:47:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 541 transitions. [2022-01-31 19:47:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:47:18,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:18,496 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 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 19:47:18,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:47:18,496 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:18,496 INFO L85 PathProgramCache]: Analyzing trace with hash 431475281, now seen corresponding path program 22 times [2022-01-31 19:47:18,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:18,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171500787] [2022-01-31 19:47:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:18,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:18,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:18,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:18,498 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:18,709 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 19:47:18,710 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:18,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171500787] [2022-01-31 19:47:18,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [171500787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:18,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:18,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:47:18,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855997273] [2022-01-31 19:47:18,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:18,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:47:18,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:18,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:47:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:47:18,711 INFO L87 Difference]: Start difference. First operand 515 states and 541 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 19:47:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:19,895 INFO L93 Difference]: Finished difference Result 882 states and 930 transitions. [2022-01-31 19:47:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:47:19,895 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 210 [2022-01-31 19:47:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:19,896 INFO L225 Difference]: With dead ends: 882 [2022-01-31 19:47:19,896 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 19:47:19,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:47:19,898 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 611 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:19,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 51 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [699 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:47:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 19:47:20,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 229. [2022-01-31 19:47:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0491071428571428) internal successors, (235), 224 states have internal predecessors, (235), 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 19:47:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 239 transitions. [2022-01-31 19:47:20,001 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 239 transitions. Word has length 210 [2022-01-31 19:47:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:20,001 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 239 transitions. [2022-01-31 19:47:20,001 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 19:47:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 239 transitions. [2022-01-31 19:47:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 19:47:20,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:20,002 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, 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 19:47:20,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:47:20,003 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1342407841, now seen corresponding path program 23 times [2022-01-31 19:47:20,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:20,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664597806] [2022-01-31 19:47:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:20,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:20,005 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:20,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:20,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:20,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:20,262 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 19:47:20,262 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:20,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664597806] [2022-01-31 19:47:20,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1664597806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:20,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:20,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:47:20,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702468673] [2022-01-31 19:47:20,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:20,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:47:20,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:20,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:47:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:47:20,263 INFO L87 Difference]: Start difference. First operand 229 states and 239 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 19:47:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:21,132 INFO L93 Difference]: Finished difference Result 236 states and 246 transitions. [2022-01-31 19:47:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:47:21,132 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 228 [2022-01-31 19:47:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:21,133 INFO L225 Difference]: With dead ends: 236 [2022-01-31 19:47:21,133 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 19:47:21,133 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 19:47:21,134 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 470 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:21,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 55 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:47:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 19:47:21,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-01-31 19:47:21,237 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 19:47:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 241 transitions. [2022-01-31 19:47:21,238 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 241 transitions. Word has length 228 [2022-01-31 19:47:21,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:21,238 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 241 transitions. [2022-01-31 19:47:21,238 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 19:47:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 241 transitions. [2022-01-31 19:47:21,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 19:47:21,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:21,239 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 19:47:21,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:47:21,239 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash -550404547, now seen corresponding path program 24 times [2022-01-31 19:47:21,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:21,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222519367] [2022-01-31 19:47:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:21,241 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:21,241 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:21,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:21,242 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:10,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:10,480 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 19:48:10,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:10,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222519367] [2022-01-31 19:48:10,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222519367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:10,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:10,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [213] imperfect sequences [] total 213 [2022-01-31 19:48:10,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177014968] [2022-01-31 19:48:10,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:10,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-01-31 19:48:10,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:10,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-01-31 19:48:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1398, Invalid=43758, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 19:48:10,489 INFO L87 Difference]: Start difference. First operand 231 states and 241 transitions. Second operand has 213 states, 213 states have (on average 1.0610328638497653) internal successors, (226), 211 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 19:50:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:53,636 INFO L93 Difference]: Finished difference Result 979 states and 1042 transitions. [2022-01-31 19:50:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2022-01-31 19:50:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.0610328638497653) internal successors, (226), 211 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 19:50:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:53,641 INFO L225 Difference]: With dead ends: 979 [2022-01-31 19:50:53,641 INFO L226 Difference]: Without dead ends: 971 [2022-01-31 19:50:53,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 435 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51796 ImplicationChecksByTransitivity, 160.2s TimeCoverageRelationStatistics Valid=15848, Invalid=174683, Unknown=1, NotChecked=0, Total=190532 [2022-01-31 19:50:53,653 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 5835 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 35724 mSolverCounterSat, 10433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5835 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 46157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10433 IncrementalHoareTripleChecker+Valid, 35724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:53,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5835 Valid, 976 Invalid, 46157 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10433 Valid, 35724 Invalid, 0 Unknown, 0 Unchecked, 35.6s Time] [2022-01-31 19:50:53,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-01-31 19:50:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 632. [2022-01-31 19:50:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 627 states have (on average 1.062200956937799) internal successors, (666), 627 states have internal predecessors, (666), 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 19:50:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 670 transitions. [2022-01-31 19:50:54,048 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 670 transitions. Word has length 230 [2022-01-31 19:50:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:54,048 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 670 transitions. [2022-01-31 19:50:54,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.0610328638497653) internal successors, (226), 211 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 19:50:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 670 transitions. [2022-01-31 19:50:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 19:50:54,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:54,050 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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 19:50:54,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:50:54,050 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash 355549595, now seen corresponding path program 25 times [2022-01-31 19:50:54,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:54,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845253035] [2022-01-31 19:50:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:54,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:54,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:54,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:54,053 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:54,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:54,404 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 19:50:54,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:54,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845253035] [2022-01-31 19:50:54,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1845253035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:54,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:54,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:50:54,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696005737] [2022-01-31 19:50:54,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:54,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:50:54,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:50:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:50:54,408 INFO L87 Difference]: Start difference. First operand 632 states and 670 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 19:50:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:55,875 INFO L93 Difference]: Finished difference Result 1055 states and 1120 transitions. [2022-01-31 19:50:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:50:55,875 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 232 [2022-01-31 19:50:55,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:55,883 INFO L225 Difference]: With dead ends: 1055 [2022-01-31 19:50:55,883 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 19:50:55,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:50:55,894 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 579 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:55,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 57 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:50:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 19:50:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2022-01-31 19:50:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0451127819548873) internal successors, (278), 266 states have internal predecessors, (278), 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 19:50:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 282 transitions. [2022-01-31 19:50:56,081 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 282 transitions. Word has length 232 [2022-01-31 19:50:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:56,081 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 282 transitions. [2022-01-31 19:50:56,081 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 19:50:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 282 transitions. [2022-01-31 19:50:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-31 19:50:56,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:56,082 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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 19:50:56,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:50:56,083 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1057799179, now seen corresponding path program 26 times [2022-01-31 19:50:56,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:56,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631111424] [2022-01-31 19:50:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:56,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:56,086 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:56,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:56,088 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:56,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:56,531 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 19:50:56,531 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:56,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631111424] [2022-01-31 19:50:56,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1631111424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:56,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:56,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:50:56,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319701107] [2022-01-31 19:50:56,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:56,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:50:56,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:56,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:50:56,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:50:56,532 INFO L87 Difference]: Start difference. First operand 271 states and 282 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 19:50:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:57,868 INFO L93 Difference]: Finished difference Result 278 states and 289 transitions. [2022-01-31 19:50:57,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:50:57,869 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 248 [2022-01-31 19:50:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:57,870 INFO L225 Difference]: With dead ends: 278 [2022-01-31 19:50:57,870 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 19:50:57,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=400, Invalid=1492, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:50:57,871 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 433 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:57,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 63 Invalid, 2196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:50:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 19:50:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-01-31 19:50:58,028 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 19:50:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 263 transitions. [2022-01-31 19:50:58,029 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 263 transitions. Word has length 248 [2022-01-31 19:50:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:58,029 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 263 transitions. [2022-01-31 19:50:58,029 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 19:50:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 263 transitions. [2022-01-31 19:50:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-31 19:50:58,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:58,031 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 19:50:58,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:50:58,031 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:58,031 INFO L85 PathProgramCache]: Analyzing trace with hash 325495943, now seen corresponding path program 27 times [2022-01-31 19:50:58,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:58,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367591197] [2022-01-31 19:50:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:58,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:58,034 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:58,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:58,035 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:00,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:52:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:00,743 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 19:52:00,743 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:52:00,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367591197] [2022-01-31 19:52:00,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [367591197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:52:00,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:52:00,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [235] imperfect sequences [] total 235 [2022-01-31 19:52:00,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583306905] [2022-01-31 19:52:00,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:52:00,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2022-01-31 19:52:00,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:52:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2022-01-31 19:52:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2243, Invalid=52747, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 19:52:00,753 INFO L87 Difference]: Start difference. First operand 253 states and 263 transitions. Second operand has 235 states, 235 states have (on average 1.0553191489361702) internal successors, (248), 233 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)