/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_const2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:32:28,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:32:28,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:32:28,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:32:28,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:32:28,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:32:28,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:32:28,950 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 19:32:28,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:32:28,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:32:28,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:32:28,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:32:28,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:32:28,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:32:28,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:32:28,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:32:28,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:32:28,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:32:28,969 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:32:28,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:32:28,970 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:32:28,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:32:28,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:32:28,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:32:28,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:32:28,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:32:28,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:32:28,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:32:28,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:32:28,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:32:28,971 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:32:28,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:32:29,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:32:29,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:32:29,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:32:29,202 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:32:29,205 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:32:29,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2022-01-31 19:32:29,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42a3b7e7/cddd173dde6c4f85832a72dab8e3d7f3/FLAGad07b1446 [2022-01-31 19:32:29,610 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:32:29,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2022-01-31 19:32:29,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42a3b7e7/cddd173dde6c4f85832a72dab8e3d7f3/FLAGad07b1446 [2022-01-31 19:32:29,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42a3b7e7/cddd173dde6c4f85832a72dab8e3d7f3 [2022-01-31 19:32:29,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:32:29,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:32:29,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:32:29,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:32:29,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:32:29,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:32:29" (1/1) ... [2022-01-31 19:32:29,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a22fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29, skipping insertion in model container [2022-01-31 19:32:29,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:32:29" (1/1) ... [2022-01-31 19:32:29,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:32:29,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:32:29,795 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_const2.c[406,419] [2022-01-31 19:32:29,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:32:29,814 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:32:29,823 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_const2.c[406,419] [2022-01-31 19:32:29,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:32:29,839 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:32:29,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29 WrapperNode [2022-01-31 19:32:29,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:32:29,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:32:29,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:32:29,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:32:29,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29" (1/1) ... [2022-01-31 19:32:29,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29" (1/1) ... [2022-01-31 19:32:29,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29" (1/1) ... [2022-01-31 19:32:29,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29" (1/1) ... [2022-01-31 19:32:29,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29" (1/1) ... [2022-01-31 19:32:29,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29" (1/1) ... [2022-01-31 19:32:29,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29" (1/1) ... [2022-01-31 19:32:29,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:32:29,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:32:29,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:32:29,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:32:29,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29" (1/1) ... [2022-01-31 19:32:29,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:32:29,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:32:29,900 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 19:32:29,926 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 19:32:29,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:32:29,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:32:29,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:32:29,939 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:32:29,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:32:29,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:32:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:32:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:32:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:32:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:32:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:32:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:32:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 19:32:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 19:32:29,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:32:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 19:32:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:32:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:32:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:32:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:32:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:32:29,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:32:30,017 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:32:30,019 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:32:30,122 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:32:30,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:32:30,127 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 19:32:30,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:32:30 BoogieIcfgContainer [2022-01-31 19:32:30,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:32:30,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:32:30,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:32:30,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:32:30,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:32:29" (1/3) ... [2022-01-31 19:32:30,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f275563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:32:30, skipping insertion in model container [2022-01-31 19:32:30,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:32:29" (2/3) ... [2022-01-31 19:32:30,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f275563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:32:30, skipping insertion in model container [2022-01-31 19:32:30,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:32:30" (3/3) ... [2022-01-31 19:32:30,135 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2022-01-31 19:32:30,139 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:32:30,139 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:32:30,174 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:32:30,186 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 19:32:30,187 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:32:30,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 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 19:32:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 19:32:30,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:30,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:30,223 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1320960155, now seen corresponding path program 1 times [2022-01-31 19:32:30,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:30,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073181909] [2022-01-31 19:32:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:30,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:30,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:30,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:30,490 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:30,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073181909] [2022-01-31 19:32:30,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1073181909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:30,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:30,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:32:30,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589794181] [2022-01-31 19:32:30,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:30,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:32:30,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:30,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:32:30,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:32:30,520 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.52) internal successors, (38), 27 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:30,637 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2022-01-31 19:32:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:32:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 19:32:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:30,644 INFO L225 Difference]: With dead ends: 59 [2022-01-31 19:32:30,644 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 19:32:30,646 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 19:32:30,649 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:30,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 19:32:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 19:32:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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 19:32:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 19:32:30,677 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2022-01-31 19:32:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:30,677 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 19:32:30,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 19:32:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 19:32:30,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:30,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:30,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:32:30,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:30,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2102312655, now seen corresponding path program 1 times [2022-01-31 19:32:30,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:30,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992736589] [2022-01-31 19:32:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:30,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:30,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:30,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:30,697 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:30,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:30,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:30,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992736589] [2022-01-31 19:32:30,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992736589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:30,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:30,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:32:30,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595340373] [2022-01-31 19:32:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:30,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:32:30,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:30,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:32:30,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:32:30,788 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:30,891 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-01-31 19:32:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:32:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 19:32:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:30,893 INFO L225 Difference]: With dead ends: 50 [2022-01-31 19:32:30,893 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 19:32:30,893 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 19:32:30,894 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:30,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 19:32:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-01-31 19:32:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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 19:32:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 19:32:30,904 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2022-01-31 19:32:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:30,904 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 19:32:30,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 19:32:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 19:32:30,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:30,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:30,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:32:30,906 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash -18623191, now seen corresponding path program 1 times [2022-01-31 19:32:30,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:30,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677044113] [2022-01-31 19:32:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:30,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:30,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:30,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:30,911 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:30,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:30,999 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:30,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677044113] [2022-01-31 19:32:30,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [677044113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:30,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:30,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:32:31,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924949317] [2022-01-31 19:32:31,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:31,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:32:31,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:31,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:32:31,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:32:31,001 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 19:32:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:31,060 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-01-31 19:32:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:32:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 19:32:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:31,061 INFO L225 Difference]: With dead ends: 54 [2022-01-31 19:32:31,061 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 19:32:31,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:32:31,063 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:31,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:32:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 19:32:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 19:32:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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 19:32:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 19:32:31,071 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2022-01-31 19:32:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:31,071 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 19:32:31,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 19:32:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 19:32:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 19:32:31,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:31,072 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] [2022-01-31 19:32:31,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:32:31,073 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1635812359, now seen corresponding path program 2 times [2022-01-31 19:32:31,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:31,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885262723] [2022-01-31 19:32:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:31,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:31,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:31,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:31,078 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:31,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:31,149 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:31,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885262723] [2022-01-31 19:32:31,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1885262723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:31,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:31,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:32:31,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803805079] [2022-01-31 19:32:31,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:31,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:32:31,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:31,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:32:31,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:32:31,151 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 19:32:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:31,237 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-01-31 19:32:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:32:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 19:32:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:31,239 INFO L225 Difference]: With dead ends: 58 [2022-01-31 19:32:31,239 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 19:32:31,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:32:31,250 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:31,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 25 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 19:32:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-31 19:32:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 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 19:32:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-01-31 19:32:31,259 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-01-31 19:32:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:31,259 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-01-31 19:32:31,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 19:32:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-01-31 19:32:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 19:32:31,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:31,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:31,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:32:31,261 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1580155391, now seen corresponding path program 3 times [2022-01-31 19:32:31,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:31,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458063694] [2022-01-31 19:32:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:31,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:31,266 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:31,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:31,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:32,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:32,274 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:32,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458063694] [2022-01-31 19:32:32,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [458063694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:32,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:32,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:32:32,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276381013] [2022-01-31 19:32:32,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:32,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:32:32,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:32:32,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:32:32,279 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 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 19:32:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:32,607 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-01-31 19:32:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:32:32,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 19:32:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:32,611 INFO L225 Difference]: With dead ends: 67 [2022-01-31 19:32:32,611 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 19:32:32,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:32:32,612 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:32,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:32:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 19:32:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-01-31 19:32:32,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 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 19:32:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-01-31 19:32:32,636 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2022-01-31 19:32:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:32,636 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-01-31 19:32:32,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 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 19:32:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-01-31 19:32:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 19:32:32,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:32,639 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:32,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:32:32,639 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1604297437, now seen corresponding path program 4 times [2022-01-31 19:32:32,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:32,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084186293] [2022-01-31 19:32:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:32,643 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:32,643 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:32,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:32,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:32,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:32,744 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084186293] [2022-01-31 19:32:32,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1084186293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:32,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:32,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:32:32,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982516907] [2022-01-31 19:32:32,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:32,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:32:32,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:32:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:32:32,747 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:32,928 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2022-01-31 19:32:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:32:32,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 19:32:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:32,932 INFO L225 Difference]: With dead ends: 122 [2022-01-31 19:32:32,932 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 19:32:32,932 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 19:32:32,935 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:32,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 31 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 19:32:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2022-01-31 19:32:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.125) internal successors, (63), 56 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 19:32:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-01-31 19:32:32,957 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 42 [2022-01-31 19:32:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:32,958 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-01-31 19:32:32,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-01-31 19:32:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 19:32:32,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:32,962 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:32,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:32:32,963 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:32,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:32,963 INFO L85 PathProgramCache]: Analyzing trace with hash -800164613, now seen corresponding path program 5 times [2022-01-31 19:32:32,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:32,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078244] [2022-01-31 19:32:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:32,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:32,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:32,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:32,966 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:33,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:33,061 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078244] [2022-01-31 19:32:33,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:33,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:33,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:32:33,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098477639] [2022-01-31 19:32:33,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:33,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:32:33,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:33,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:32:33,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:32:33,063 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:33,227 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-01-31 19:32:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:32:33,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 19:32:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:33,229 INFO L225 Difference]: With dead ends: 68 [2022-01-31 19:32:33,229 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 19:32:33,229 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 19:32:33,230 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:33,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 41 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 19:32:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-31 19:32:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 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 19:32:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-01-31 19:32:33,256 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2022-01-31 19:32:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:33,256 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-01-31 19:32:33,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-01-31 19:32:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 19:32:33,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:33,258 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:32:33,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:32:33,258 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:33,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2015110315, now seen corresponding path program 6 times [2022-01-31 19:32:33,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:33,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565531800] [2022-01-31 19:32:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:33,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:33,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:33,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:33,261 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:35,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:35,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:35,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565531800] [2022-01-31 19:32:35,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [565531800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:35,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:35,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:32:35,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930640640] [2022-01-31 19:32:35,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:35,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:32:35,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:32:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:32:35,196 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 38 states have internal predecessors, (46), 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 19:32:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:37,179 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2022-01-31 19:32:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:32:37,179 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 38 states have internal predecessors, (46), 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 50 [2022-01-31 19:32:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:37,180 INFO L225 Difference]: With dead ends: 85 [2022-01-31 19:32:37,180 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 19:32:37,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=340, Invalid=3442, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:32:37,182 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:37,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 176 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:32:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 19:32:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-01-31 19:32:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 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 19:32:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-01-31 19:32:37,203 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 50 [2022-01-31 19:32:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:37,204 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-01-31 19:32:37,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 38 states have internal predecessors, (46), 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 19:32:37,204 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-01-31 19:32:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 19:32:37,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:37,209 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:37,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:32:37,209 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:37,209 INFO L85 PathProgramCache]: Analyzing trace with hash -162918733, now seen corresponding path program 7 times [2022-01-31 19:32:37,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:37,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784997154] [2022-01-31 19:32:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:37,211 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:37,211 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:37,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:37,213 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:37,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:37,309 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784997154] [2022-01-31 19:32:37,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784997154] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:37,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:37,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:32:37,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131017850] [2022-01-31 19:32:37,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:37,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:32:37,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:37,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:32:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:32:37,312 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 19:32:37,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:37,554 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2022-01-31 19:32:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:32:37,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 52 [2022-01-31 19:32:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:37,556 INFO L225 Difference]: With dead ends: 150 [2022-01-31 19:32:37,556 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 19:32:37,556 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 19:32:37,557 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:37,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 49 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 19:32:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2022-01-31 19:32:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 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 19:32:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2022-01-31 19:32:37,579 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 52 [2022-01-31 19:32:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:37,579 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2022-01-31 19:32:37,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 19:32:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2022-01-31 19:32:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:32:37,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:37,582 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:37,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:32:37,583 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1929999185, now seen corresponding path program 8 times [2022-01-31 19:32:37,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282845349] [2022-01-31 19:32:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:37,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:37,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:37,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:37,586 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:37,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:37,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:37,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282845349] [2022-01-31 19:32:37,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282845349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:37,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:37,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:32:37,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938416323] [2022-01-31 19:32:37,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:37,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:32:37,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:37,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:32:37,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:32:37,710 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 19:32:37,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:37,935 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2022-01-31 19:32:37,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:32:37,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 19:32:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:37,936 INFO L225 Difference]: With dead ends: 82 [2022-01-31 19:32:37,936 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 19:32:37,937 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 19:32:37,937 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:37,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 37 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 19:32:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-31 19:32:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 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 19:32:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-01-31 19:32:37,952 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2022-01-31 19:32:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:37,952 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-01-31 19:32:37,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 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 19:32:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-01-31 19:32:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 19:32:37,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:37,953 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:32:37,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:32:37,954 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:37,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:37,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1318846763, now seen corresponding path program 9 times [2022-01-31 19:32:37,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:37,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506268228] [2022-01-31 19:32:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:37,956 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:37,956 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:37,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:37,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:40,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:40,777 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:40,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506268228] [2022-01-31 19:32:40,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [506268228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:40,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:40,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:32:40,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445541612] [2022-01-31 19:32:40,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:40,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:32:40,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:40,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:32:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:32:40,779 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 48 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 19:32:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:43,732 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-01-31 19:32:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:32:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 48 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 60 [2022-01-31 19:32:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:43,733 INFO L225 Difference]: With dead ends: 102 [2022-01-31 19:32:43,733 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 19:32:43,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=621, Invalid=6351, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:32:43,735 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:43,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 177 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:32:43,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 19:32:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2022-01-31 19:32:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 81 states have internal predecessors, (89), 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 19:32:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-01-31 19:32:43,754 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 60 [2022-01-31 19:32:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:43,754 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-01-31 19:32:43,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 48 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 19:32:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-01-31 19:32:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 19:32:43,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:43,755 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-31 19:32:43,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:32:43,755 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1322968841, now seen corresponding path program 10 times [2022-01-31 19:32:43,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:43,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74357061] [2022-01-31 19:32:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:43,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:43,757 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:43,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:43,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:43,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:43,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:43,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74357061] [2022-01-31 19:32:43,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [74357061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:43,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:43,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:32:43,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541666973] [2022-01-31 19:32:43,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:43,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:32:43,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:43,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:32:43,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:32:43,860 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:44,142 INFO L93 Difference]: Finished difference Result 178 states and 194 transitions. [2022-01-31 19:32:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:32:44,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 19:32:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:44,143 INFO L225 Difference]: With dead ends: 178 [2022-01-31 19:32:44,143 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 19:32:44,144 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 19:32:44,144 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 121 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:44,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 47 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 19:32:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2022-01-31 19:32:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 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 19:32:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-01-31 19:32:44,163 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 62 [2022-01-31 19:32:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:44,164 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-01-31 19:32:44,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-01-31 19:32:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 19:32:44,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:44,165 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2022-01-31 19:32:44,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:32:44,165 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:44,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1981956569, now seen corresponding path program 11 times [2022-01-31 19:32:44,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:44,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541069590] [2022-01-31 19:32:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:44,168 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:44,168 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:44,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:44,171 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:44,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:44,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:44,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541069590] [2022-01-31 19:32:44,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541069590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:44,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:44,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:32:44,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522178820] [2022-01-31 19:32:44,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:44,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:32:44,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:44,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:32:44,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:32:44,279 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:44,570 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2022-01-31 19:32:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:32:44,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 19:32:44,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:44,572 INFO L225 Difference]: With dead ends: 96 [2022-01-31 19:32:44,572 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 19:32:44,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:32:44,573 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:44,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 53 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 19:32:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-01-31 19:32:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 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 19:32:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-01-31 19:32:44,585 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 64 [2022-01-31 19:32:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:44,585 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-01-31 19:32:44,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-01-31 19:32:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 19:32:44,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:44,586 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:32:44,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:32:44,586 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:44,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:44,586 INFO L85 PathProgramCache]: Analyzing trace with hash -579202175, now seen corresponding path program 12 times [2022-01-31 19:32:44,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:44,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740598304] [2022-01-31 19:32:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:44,588 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:44,588 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:44,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:44,589 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:48,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:48,253 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740598304] [2022-01-31 19:32:48,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [740598304] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:48,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:48,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 19:32:48,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305487555] [2022-01-31 19:32:48,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:48,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 19:32:48,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 19:32:48,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3159, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:32:48,255 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 59 states, 59 states have (on average 1.11864406779661) internal successors, (66), 57 states have internal predecessors, (66), 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 19:32:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:52,685 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2022-01-31 19:32:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:32:52,686 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.11864406779661) internal successors, (66), 57 states have internal predecessors, (66), 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 70 [2022-01-31 19:32:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:52,688 INFO L225 Difference]: With dead ends: 120 [2022-01-31 19:32:52,688 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 19:32:52,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=785, Invalid=9315, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 19:32:52,690 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:52,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 195 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:32:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 19:32:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2022-01-31 19:32:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 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 19:32:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2022-01-31 19:32:52,716 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 70 [2022-01-31 19:32:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:52,716 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2022-01-31 19:32:52,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.11864406779661) internal successors, (66), 57 states have internal predecessors, (66), 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 19:32:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2022-01-31 19:32:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 19:32:52,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:52,717 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2022-01-31 19:32:52,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:32:52,718 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:52,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2086439903, now seen corresponding path program 13 times [2022-01-31 19:32:52,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:52,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822770508] [2022-01-31 19:32:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:52,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:52,720 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:52,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:52,721 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:52,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:52,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:52,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822770508] [2022-01-31 19:32:52,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [822770508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:52,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:52,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:32:52,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289251943] [2022-01-31 19:32:52,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:52,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:32:52,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:32:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:32:52,862 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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 19:32:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:53,185 INFO L93 Difference]: Finished difference Result 206 states and 222 transitions. [2022-01-31 19:32:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:32:53,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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 72 [2022-01-31 19:32:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:53,186 INFO L225 Difference]: With dead ends: 206 [2022-01-31 19:32:53,187 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 19:32:53,187 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 19:32:53,188 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 152 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:53,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 37 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 19:32:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2022-01-31 19:32:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0714285714285714) internal successors, (105), 98 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 19:32:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2022-01-31 19:32:53,212 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 72 [2022-01-31 19:32:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:53,212 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2022-01-31 19:32:53,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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 19:32:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2022-01-31 19:32:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 19:32:53,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:53,213 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-01-31 19:32:53,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:32:53,213 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:53,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1614957187, now seen corresponding path program 14 times [2022-01-31 19:32:53,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:53,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059812750] [2022-01-31 19:32:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:53,215 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:53,215 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:53,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:53,216 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:53,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:53,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:53,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059812750] [2022-01-31 19:32:53,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059812750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:53,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:53,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:32:53,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086677861] [2022-01-31 19:32:53,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:53,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:32:53,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:53,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:32:53,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:32:53,346 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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 19:32:53,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:53,669 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-01-31 19:32:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:32:53,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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 74 [2022-01-31 19:32:53,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:53,670 INFO L225 Difference]: With dead ends: 110 [2022-01-31 19:32:53,670 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 19:32:53,671 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 19:32:53,671 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:53,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 57 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 19:32:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-01-31 19:32:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 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 19:32:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-01-31 19:32:53,689 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 74 [2022-01-31 19:32:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:53,699 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-01-31 19:32:53,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 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 19:32:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-01-31 19:32:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 19:32:53,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:53,700 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:32:53,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:32:53,700 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:53,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:53,700 INFO L85 PathProgramCache]: Analyzing trace with hash 774402647, now seen corresponding path program 15 times [2022-01-31 19:32:53,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:53,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232820593] [2022-01-31 19:32:53,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:53,702 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:53,702 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:53,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:53,703 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:58,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:58,313 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232820593] [2022-01-31 19:32:58,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [232820593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:58,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:58,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 19:32:58,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881307388] [2022-01-31 19:32:58,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:58,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 19:32:58,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:58,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 19:32:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=4352, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:32:58,316 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 67 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 19:33:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:03,664 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2022-01-31 19:33:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 19:33:03,665 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 67 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 80 [2022-01-31 19:33:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:03,665 INFO L225 Difference]: With dead ends: 133 [2022-01-31 19:33:03,666 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 19:33:03,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2720 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1040, Invalid=12070, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 19:33:03,669 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:03,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 254 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2556 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:33:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 19:33:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2022-01-31 19:33:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.073394495412844) internal successors, (117), 109 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2022-01-31 19:33:03,698 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 80 [2022-01-31 19:33:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:03,698 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2022-01-31 19:33:03,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 67 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 19:33:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2022-01-31 19:33:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 19:33:03,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:03,699 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 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] [2022-01-31 19:33:03,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:33:03,699 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash 509697333, now seen corresponding path program 16 times [2022-01-31 19:33:03,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110368305] [2022-01-31 19:33:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:03,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:03,700 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:03,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:03,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:03,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:03,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:03,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110368305] [2022-01-31 19:33:03,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [110368305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:03,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:03,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:33:03,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789801795] [2022-01-31 19:33:03,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:03,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:33:03,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:33:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:33:03,848 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:04,235 INFO L93 Difference]: Finished difference Result 234 states and 250 transitions. [2022-01-31 19:33:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:33:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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 82 [2022-01-31 19:33:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:04,236 INFO L225 Difference]: With dead ends: 234 [2022-01-31 19:33:04,236 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 19:33:04,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:33:04,237 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 171 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:04,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 43 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:04,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 19:33:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2022-01-31 19:33:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0625) internal successors, (119), 112 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2022-01-31 19:33:04,275 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 82 [2022-01-31 19:33:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:04,275 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2022-01-31 19:33:04,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2022-01-31 19:33:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 19:33:04,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:04,276 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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] [2022-01-31 19:33:04,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:33:04,276 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:04,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1977370285, now seen corresponding path program 17 times [2022-01-31 19:33:04,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:04,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519520613] [2022-01-31 19:33:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:04,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:04,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:04,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:04,279 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:04,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:04,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:04,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519520613] [2022-01-31 19:33:04,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519520613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:04,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:04,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:33:04,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404559904] [2022-01-31 19:33:04,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:04,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:33:04,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:04,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:33:04,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:33:04,437 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:04,788 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-01-31 19:33:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:33:04,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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 84 [2022-01-31 19:33:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:04,789 INFO L225 Difference]: With dead ends: 124 [2022-01-31 19:33:04,789 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 19:33:04,789 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 19:33:04,789 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 168 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:04,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 43 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 19:33:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-01-31 19:33:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-01-31 19:33:04,819 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 84 [2022-01-31 19:33:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:04,820 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-01-31 19:33:04,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-01-31 19:33:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 19:33:04,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:04,820 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:33:04,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:33:04,821 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:04,821 INFO L85 PathProgramCache]: Analyzing trace with hash -19300947, now seen corresponding path program 18 times [2022-01-31 19:33:04,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:04,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875891511] [2022-01-31 19:33:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:04,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:04,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:04,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:04,824 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:10,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:10,527 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:10,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875891511] [2022-01-31 19:33:10,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [875891511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:10,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:10,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 19:33:10,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910969697] [2022-01-31 19:33:10,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:10,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 19:33:10,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:10,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 19:33:10,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=5595, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:33:10,530 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 79 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:16,576 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2022-01-31 19:33:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:33:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 77 states have internal predecessors, (86), 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 90 [2022-01-31 19:33:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:16,578 INFO L225 Difference]: With dead ends: 152 [2022-01-31 19:33:16,578 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 19:33:16,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4521 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1285, Invalid=14465, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 19:33:16,580 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 2968 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 3167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:16,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 228 Invalid, 3167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2968 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 19:33:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 19:33:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 128. [2022-01-31 19:33:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2022-01-31 19:33:16,618 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 90 [2022-01-31 19:33:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:16,618 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2022-01-31 19:33:16,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2022-01-31 19:33:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 19:33:16,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:16,619 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 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] [2022-01-31 19:33:16,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:33:16,620 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:16,620 INFO L85 PathProgramCache]: Analyzing trace with hash -687621365, now seen corresponding path program 19 times [2022-01-31 19:33:16,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:16,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468868051] [2022-01-31 19:33:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:16,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:16,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:16,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:16,622 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:16,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:16,786 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 19:33:16,786 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:16,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468868051] [2022-01-31 19:33:16,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [468868051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:16,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:16,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:33:16,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572157423] [2022-01-31 19:33:16,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:16,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:33:16,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:33:16,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:33:16,787 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:17,255 INFO L93 Difference]: Finished difference Result 262 states and 278 transitions. [2022-01-31 19:33:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:33:17,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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 92 [2022-01-31 19:33:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:17,258 INFO L225 Difference]: With dead ends: 262 [2022-01-31 19:33:17,258 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 19:33:17,258 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 19:33:17,259 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 242 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:17,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 37 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 19:33:17,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2022-01-31 19:33:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0555555555555556) internal successors, (133), 126 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2022-01-31 19:33:17,300 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 92 [2022-01-31 19:33:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:17,300 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2022-01-31 19:33:17,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2022-01-31 19:33:17,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 19:33:17,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:17,301 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2022-01-31 19:33:17,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:33:17,301 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1595025833, now seen corresponding path program 20 times [2022-01-31 19:33:17,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:17,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354598332] [2022-01-31 19:33:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:17,303 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:17,303 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:17,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:17,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:17,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:17,475 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354598332] [2022-01-31 19:33:17,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1354598332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:17,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:17,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:33:17,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342261628] [2022-01-31 19:33:17,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:17,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:33:17,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:17,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:33:17,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:33:17,476 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:17,989 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2022-01-31 19:33:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:33:17,991 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 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 94 [2022-01-31 19:33:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:17,992 INFO L225 Difference]: With dead ends: 138 [2022-01-31 19:33:17,992 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 19:33:17,992 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 19:33:17,993 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 202 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:17,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 45 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 19:33:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-01-31 19:33:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 96 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-01-31 19:33:18,043 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 94 [2022-01-31 19:33:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:18,043 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-01-31 19:33:18,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-01-31 19:33:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 19:33:18,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:18,044 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:33:18,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:33:18,044 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:18,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1212650883, now seen corresponding path program 21 times [2022-01-31 19:33:18,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:18,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133704876] [2022-01-31 19:33:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:18,046 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:18,046 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:18,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:18,047 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:25,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:25,799 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:25,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133704876] [2022-01-31 19:33:25,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [133704876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:25,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:25,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 19:33:25,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112589206] [2022-01-31 19:33:25,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:25,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 19:33:25,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:25,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 19:33:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=7300, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:33:25,801 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 90 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 88 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:35,117 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2022-01-31 19:33:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 19:33:35,118 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 88 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 19:33:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:35,119 INFO L225 Difference]: With dead ends: 162 [2022-01-31 19:33:35,119 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 19:33:35,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6381 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=2076, Invalid=21486, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 19:33:35,121 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 3364 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 3364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:35,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 271 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 3364 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 19:33:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 19:33:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 142. [2022-01-31 19:33:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0583941605839415) internal successors, (145), 137 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2022-01-31 19:33:35,167 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 100 [2022-01-31 19:33:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:35,168 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2022-01-31 19:33:35,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 88 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2022-01-31 19:33:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:33:35,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:35,169 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 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] [2022-01-31 19:33:35,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:33:35,169 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:35,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1088816481, now seen corresponding path program 22 times [2022-01-31 19:33:35,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:35,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135337361] [2022-01-31 19:33:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:35,171 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:35,171 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:35,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:35,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:35,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:35,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:35,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135337361] [2022-01-31 19:33:35,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [135337361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:35,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:35,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:33:35,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106429368] [2022-01-31 19:33:35,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:35,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:33:35,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:35,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:33:35,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:33:35,374 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:35,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:35,888 INFO L93 Difference]: Finished difference Result 290 states and 306 transitions. [2022-01-31 19:33:35,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:33:35,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 102 [2022-01-31 19:33:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:35,890 INFO L225 Difference]: With dead ends: 290 [2022-01-31 19:33:35,890 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 19:33:35,890 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 19:33:35,890 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 312 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:35,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 33 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 19:33:35,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 145. [2022-01-31 19:33:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.05) internal successors, (147), 140 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 151 transitions. [2022-01-31 19:33:35,941 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 151 transitions. Word has length 102 [2022-01-31 19:33:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:35,941 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 151 transitions. [2022-01-31 19:33:35,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:35,942 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 151 transitions. [2022-01-31 19:33:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 19:33:35,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:35,943 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 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] [2022-01-31 19:33:35,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:33:35,943 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:35,943 INFO L85 PathProgramCache]: Analyzing trace with hash -351050113, now seen corresponding path program 23 times [2022-01-31 19:33:35,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:35,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123102779] [2022-01-31 19:33:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:35,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:35,945 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:35,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:35,946 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:36,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:36,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:36,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123102779] [2022-01-31 19:33:36,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [123102779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:36,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:36,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:33:36,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327489746] [2022-01-31 19:33:36,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:36,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:33:36,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:36,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:33:36,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:33:36,147 INFO L87 Difference]: Start difference. First operand 145 states and 151 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:36,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:36,648 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2022-01-31 19:33:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:33:36,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 104 [2022-01-31 19:33:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:36,649 INFO L225 Difference]: With dead ends: 152 [2022-01-31 19:33:36,649 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 19:33:36,649 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 19:33:36,649 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 201 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:36,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 53 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 19:33:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-01-31 19:33:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-01-31 19:33:36,691 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 104 [2022-01-31 19:33:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:36,691 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-01-31 19:33:36,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-01-31 19:33:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 19:33:36,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:36,692 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:33:36,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:33:36,692 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash 867506649, now seen corresponding path program 24 times [2022-01-31 19:33:36,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:36,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698942309] [2022-01-31 19:33:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:36,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:36,694 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:36,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:36,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:45,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:45,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:45,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698942309] [2022-01-31 19:33:45,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1698942309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:45,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:45,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 19:33:45,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668332022] [2022-01-31 19:33:45,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:45,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 19:33:45,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:45,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 19:33:45,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=852, Invalid=8850, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 19:33:45,963 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 99 states, 99 states have (on average 1.0707070707070707) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:54,581 INFO L93 Difference]: Finished difference Result 181 states and 188 transitions. [2022-01-31 19:33:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 19:33:54,582 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0707070707070707) internal successors, (106), 97 states have internal predecessors, (106), 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 110 [2022-01-31 19:33:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:54,582 INFO L225 Difference]: With dead ends: 181 [2022-01-31 19:33:54,582 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 19:33:54,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6175 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1597, Invalid=19573, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 19:33:54,584 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:54,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 279 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 19:33:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 19:33:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 156. [2022-01-31 19:33:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0529801324503312) internal successors, (159), 151 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2022-01-31 19:33:54,653 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 110 [2022-01-31 19:33:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:54,653 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2022-01-31 19:33:54,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0707070707070707) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2022-01-31 19:33:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 19:33:54,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:54,655 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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] [2022-01-31 19:33:54,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:33:54,655 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:54,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1697815607, now seen corresponding path program 25 times [2022-01-31 19:33:54,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:54,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54329337] [2022-01-31 19:33:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:54,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:54,657 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:54,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:54,658 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:54,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:54,887 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:54,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54329337] [2022-01-31 19:33:54,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [54329337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:54,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:54,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:33:54,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996493134] [2022-01-31 19:33:54,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:54,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:33:54,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:33:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:33:54,902 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:55,491 INFO L93 Difference]: Finished difference Result 318 states and 334 transitions. [2022-01-31 19:33:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:33:55,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 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 112 [2022-01-31 19:33:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:55,492 INFO L225 Difference]: With dead ends: 318 [2022-01-31 19:33:55,492 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 19:33:55,493 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 19:33:55,493 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 265 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:55,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 43 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:33:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 19:33:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 159. [2022-01-31 19:33:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2022-01-31 19:33:55,554 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 112 [2022-01-31 19:33:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:55,554 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2022-01-31 19:33:55,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2022-01-31 19:33:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 19:33:55,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:55,555 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2022-01-31 19:33:55,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:33:55,556 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:55,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1489383467, now seen corresponding path program 26 times [2022-01-31 19:33:55,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:55,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308159245] [2022-01-31 19:33:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:55,557 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:55,558 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:55,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:55,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:55,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:55,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:55,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308159245] [2022-01-31 19:33:55,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [308159245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:55,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:55,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:33:55,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643936864] [2022-01-31 19:33:55,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:55,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:33:55,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:55,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:33:55,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:33:55,794 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:56,343 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2022-01-31 19:33:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:33:56,343 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 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 114 [2022-01-31 19:33:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:56,343 INFO L225 Difference]: With dead ends: 166 [2022-01-31 19:33:56,343 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:33:56,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=400, Invalid=1492, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:33:56,344 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 296 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:56,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 43 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:33:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-01-31 19:33:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-01-31 19:33:56,389 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 114 [2022-01-31 19:33:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:56,390 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-01-31 19:33:56,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-01-31 19:33:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:33:56,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:56,390 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:33:56,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:33:56,391 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:56,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1863554385, now seen corresponding path program 27 times [2022-01-31 19:33:56,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:56,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283332174] [2022-01-31 19:33:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:56,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:56,393 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:56,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:56,394 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:09,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:09,037 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:09,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283332174] [2022-01-31 19:34:09,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283332174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:09,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:09,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 19:34:09,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232594992] [2022-01-31 19:34:09,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:09,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 19:34:09,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:09,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 19:34:09,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=10999, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 19:34:09,039 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 109 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:25,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:25,518 INFO L93 Difference]: Finished difference Result 200 states and 208 transitions. [2022-01-31 19:34:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 19:34:25,519 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 19:34:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:25,520 INFO L225 Difference]: With dead ends: 200 [2022-01-31 19:34:25,520 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 19:34:25,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9739 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=2976, Invalid=36426, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 19:34:25,522 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 4397 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 4724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 4397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:25,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 250 Invalid, 4724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 4397 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 19:34:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 19:34:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 170. [2022-01-31 19:34:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0484848484848486) internal successors, (173), 165 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2022-01-31 19:34:25,598 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 120 [2022-01-31 19:34:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:25,598 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2022-01-31 19:34:25,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2022-01-31 19:34:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:34:25,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:25,599 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 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] [2022-01-31 19:34:25,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:34:25,600 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1315184755, now seen corresponding path program 28 times [2022-01-31 19:34:25,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:25,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927275008] [2022-01-31 19:34:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:25,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:25,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:25,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:25,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:25,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:25,830 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:25,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927275008] [2022-01-31 19:34:25,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [927275008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:25,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:25,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:34:25,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549934200] [2022-01-31 19:34:25,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:25,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:34:25,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:25,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:34:25,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:34:25,831 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:26,435 INFO L93 Difference]: Finished difference Result 346 states and 362 transitions. [2022-01-31 19:34:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:34:26,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 19:34:26,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:26,436 INFO L225 Difference]: With dead ends: 346 [2022-01-31 19:34:26,436 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 19:34:26,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:34:26,437 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 346 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:26,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 43 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:34:26,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 19:34:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2022-01-31 19:34:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0416666666666667) internal successors, (175), 168 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 179 transitions. [2022-01-31 19:34:26,537 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 179 transitions. Word has length 122 [2022-01-31 19:34:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:26,537 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 179 transitions. [2022-01-31 19:34:26,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 179 transitions. [2022-01-31 19:34:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 19:34:26,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:26,538 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 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] [2022-01-31 19:34:26,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:34:26,538 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:26,539 INFO L85 PathProgramCache]: Analyzing trace with hash 790611371, now seen corresponding path program 29 times [2022-01-31 19:34:26,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:26,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812705753] [2022-01-31 19:34:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:26,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:26,540 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:26,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:26,542 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:26,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:26,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:26,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812705753] [2022-01-31 19:34:26,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812705753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:26,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:26,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:34:26,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907376996] [2022-01-31 19:34:26,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:26,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:34:26,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:34:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:34:26,808 INFO L87 Difference]: Start difference. First operand 173 states and 179 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:27,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:27,530 INFO L93 Difference]: Finished difference Result 180 states and 186 transitions. [2022-01-31 19:34:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:34:27,532 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 124 [2022-01-31 19:34:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:27,532 INFO L225 Difference]: With dead ends: 180 [2022-01-31 19:34:27,533 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 19:34:27,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=477, Invalid=1779, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:34:27,534 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 207 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:27,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 61 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:34:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 19:34:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-01-31 19:34:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 126 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-01-31 19:34:27,613 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 124 [2022-01-31 19:34:27,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:27,613 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-01-31 19:34:27,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-01-31 19:34:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 19:34:27,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:27,615 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:27,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:34:27,615 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:27,616 INFO L85 PathProgramCache]: Analyzing trace with hash -868227067, now seen corresponding path program 30 times [2022-01-31 19:34:27,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:27,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148509597] [2022-01-31 19:34:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:27,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:27,617 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:27,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:27,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:43,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:43,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:43,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148509597] [2022-01-31 19:34:43,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [148509597] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:43,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:43,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 19:34:43,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689363446] [2022-01-31 19:34:43,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:43,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 19:34:43,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:43,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 19:34:43,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=13149, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 19:34:43,304 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 119 states, 119 states have (on average 1.0588235294117647) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:03,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:03,134 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2022-01-31 19:35:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 19:35:03,134 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.0588235294117647) internal successors, (126), 117 states have internal predecessors, (126), 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 130 [2022-01-31 19:35:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:03,135 INFO L225 Difference]: With dead ends: 214 [2022-01-31 19:35:03,135 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 19:35:03,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11463 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=3386, Invalid=41770, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 19:35:03,138 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 5461 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 5800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 5461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:03,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 344 Invalid, 5800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 5461 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 19:35:03,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 19:35:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 184. [2022-01-31 19:35:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0446927374301676) internal successors, (187), 179 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2022-01-31 19:35:03,232 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 130 [2022-01-31 19:35:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:03,233 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2022-01-31 19:35:03,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.0588235294117647) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2022-01-31 19:35:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 19:35:03,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:03,234 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:03,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:35:03,234 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:03,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1851535203, now seen corresponding path program 31 times [2022-01-31 19:35:03,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:03,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585272454] [2022-01-31 19:35:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:03,235 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:03,235 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:03,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:03,236 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:03,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:03,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:03,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585272454] [2022-01-31 19:35:03,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [585272454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:03,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:03,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:35:03,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177918428] [2022-01-31 19:35:03,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:03,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:35:03,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:03,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:35:03,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:35:03,510 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 19:35:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:04,167 INFO L93 Difference]: Finished difference Result 374 states and 390 transitions. [2022-01-31 19:35:04,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:35:04,167 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 132 [2022-01-31 19:35:04,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:04,168 INFO L225 Difference]: With dead ends: 374 [2022-01-31 19:35:04,168 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 19:35:04,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:35:04,169 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 395 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:04,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 39 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:35:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 19:35:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2022-01-31 19:35:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0384615384615385) internal successors, (189), 182 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 193 transitions. [2022-01-31 19:35:04,270 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 193 transitions. Word has length 132 [2022-01-31 19:35:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:04,270 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 193 transitions. [2022-01-31 19:35:04,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 19:35:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 193 transitions. [2022-01-31 19:35:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 19:35:04,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:04,271 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:04,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:35:04,271 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:04,272 INFO L85 PathProgramCache]: Analyzing trace with hash 921151489, now seen corresponding path program 32 times [2022-01-31 19:35:04,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:04,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015767403] [2022-01-31 19:35:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:04,273 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:04,273 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:04,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:04,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:04,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:04,593 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:04,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015767403] [2022-01-31 19:35:04,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2015767403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:04,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:04,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:35:04,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766818939] [2022-01-31 19:35:04,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:04,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:35:04,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:04,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:35:04,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:35:04,594 INFO L87 Difference]: Start difference. First operand 187 states and 193 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 19:35:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:05,351 INFO L93 Difference]: Finished difference Result 194 states and 200 transitions. [2022-01-31 19:35:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:35:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 134 [2022-01-31 19:35:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:05,353 INFO L225 Difference]: With dead ends: 194 [2022-01-31 19:35:05,353 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 19:35:05,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=2091, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:35:05,354 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 265 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:05,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 61 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:35:05,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 19:35:05,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-01-31 19:35:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.036764705882353) internal successors, (141), 136 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-01-31 19:35:05,451 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 134 [2022-01-31 19:35:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:05,452 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-01-31 19:35:05,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 19:35:05,452 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-01-31 19:35:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 19:35:05,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:05,453 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:05,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:35:05,453 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:05,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:05,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1686761947, now seen corresponding path program 33 times [2022-01-31 19:35:05,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:05,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021920474] [2022-01-31 19:35:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:05,455 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:05,455 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:05,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:05,457 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:22,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:22,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:22,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021920474] [2022-01-31 19:35:22,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1021920474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:22,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:22,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 19:35:22,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949607121] [2022-01-31 19:35:22,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:22,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 19:35:22,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 19:35:22,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=15065, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 19:35:22,783 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 128 states, 128 states have (on average 1.0625) internal successors, (136), 126 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:42,188 INFO L93 Difference]: Finished difference Result 228 states and 235 transitions. [2022-01-31 19:35:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 19:35:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.0625) internal successors, (136), 126 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 19:35:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:42,190 INFO L225 Difference]: With dead ends: 228 [2022-01-31 19:35:42,190 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 19:35:42,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12754 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=3131, Invalid=39099, Unknown=0, NotChecked=0, Total=42230 [2022-01-31 19:35:42,192 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 6402 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 6725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 6402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:42,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 386 Invalid, 6725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 6402 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-01-31 19:35:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 19:35:42,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 198. [2022-01-31 19:35:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0414507772020725) internal successors, (201), 193 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2022-01-31 19:35:42,296 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 140 [2022-01-31 19:35:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:42,296 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2022-01-31 19:35:42,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.0625) internal successors, (136), 126 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2022-01-31 19:35:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:35:42,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:42,298 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:42,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:35:42,298 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:42,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1271534663, now seen corresponding path program 34 times [2022-01-31 19:35:42,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:42,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916412346] [2022-01-31 19:35:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:42,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:42,300 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:42,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:42,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:42,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:42,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:42,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916412346] [2022-01-31 19:35:42,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1916412346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:42,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:42,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:35:42,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180958138] [2022-01-31 19:35:42,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:42,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:35:42,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:35:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:35:42,631 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:43,474 INFO L93 Difference]: Finished difference Result 402 states and 418 transitions. [2022-01-31 19:35:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:35:43,474 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 142 [2022-01-31 19:35:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:43,475 INFO L225 Difference]: With dead ends: 402 [2022-01-31 19:35:43,475 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 19:35:43,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:35:43,476 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 341 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:43,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 51 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:35:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 19:35:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 201. [2022-01-31 19:35:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0357142857142858) internal successors, (203), 196 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 207 transitions. [2022-01-31 19:35:43,597 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 207 transitions. Word has length 142 [2022-01-31 19:35:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:43,597 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 207 transitions. [2022-01-31 19:35:43,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 207 transitions. [2022-01-31 19:35:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 19:35:43,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:43,598 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:43,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:35:43,599 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash 20698839, now seen corresponding path program 35 times [2022-01-31 19:35:43,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943246855] [2022-01-31 19:35:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:43,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:43,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:43,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:43,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:43,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:43,917 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:43,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943246855] [2022-01-31 19:35:43,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1943246855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:43,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:43,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:35:43,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131005272] [2022-01-31 19:35:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:43,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:35:43,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:43,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:35:43,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:35:43,920 INFO L87 Difference]: Start difference. First operand 201 states and 207 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:44,717 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2022-01-31 19:35:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:35:44,718 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 144 [2022-01-31 19:35:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:44,718 INFO L225 Difference]: With dead ends: 208 [2022-01-31 19:35:44,718 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 19:35:44,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=2428, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:35:44,719 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 363 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:44,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 45 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:35:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 19:35:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-01-31 19:35:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 146 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-01-31 19:35:44,802 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 144 [2022-01-31 19:35:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:44,802 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-01-31 19:35:44,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-01-31 19:35:44,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 19:35:44,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:44,803 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:44,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:35:44,803 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:44,804 INFO L85 PathProgramCache]: Analyzing trace with hash -517150671, now seen corresponding path program 36 times [2022-01-31 19:35:44,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:44,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091600631] [2022-01-31 19:35:44,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:44,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:44,805 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:44,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:44,807 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:06,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:06,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:06,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091600631] [2022-01-31 19:36:06,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2091600631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:06,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:06,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 19:36:06,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249474055] [2022-01-31 19:36:06,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:06,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 19:36:06,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:06,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 19:36:06,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2166, Invalid=17016, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 19:36:06,515 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 139 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 137 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:24,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:24,531 INFO L93 Difference]: Finished difference Result 248 states and 257 transitions. [2022-01-31 19:36:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 19:36:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 137 states have internal predecessors, (146), 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 150 [2022-01-31 19:36:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:24,533 INFO L225 Difference]: With dead ends: 248 [2022-01-31 19:36:24,533 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 19:36:24,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16402 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=4995, Invalid=44511, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 19:36:24,536 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 5333 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 5936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 5333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:24,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 187 Invalid, 5936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 5333 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-31 19:36:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 19:36:24,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 212. [2022-01-31 19:36:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.038647342995169) internal successors, (215), 207 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2022-01-31 19:36:24,744 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 150 [2022-01-31 19:36:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:24,744 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2022-01-31 19:36:24,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 137 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2022-01-31 19:36:24,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 19:36:24,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:24,746 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:24,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:36:24,746 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:24,746 INFO L85 PathProgramCache]: Analyzing trace with hash -495750001, now seen corresponding path program 37 times [2022-01-31 19:36:24,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:24,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376303201] [2022-01-31 19:36:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:24,748 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:24,748 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:24,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:24,749 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:25,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:25,114 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:25,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376303201] [2022-01-31 19:36:25,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376303201] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:25,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:25,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:36:25,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447486149] [2022-01-31 19:36:25,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:25,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:36:25,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:36:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:36:25,115 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:26,033 INFO L93 Difference]: Finished difference Result 430 states and 446 transitions. [2022-01-31 19:36:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:36:26,034 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 152 [2022-01-31 19:36:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:26,035 INFO L225 Difference]: With dead ends: 430 [2022-01-31 19:36:26,035 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 19:36:26,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:36:26,036 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 410 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:26,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 47 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:36:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 19:36:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 215. [2022-01-31 19:36:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0333333333333334) internal successors, (217), 210 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 221 transitions. [2022-01-31 19:36:26,203 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 221 transitions. Word has length 152 [2022-01-31 19:36:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:26,204 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 221 transitions. [2022-01-31 19:36:26,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 221 transitions. [2022-01-31 19:36:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 19:36:26,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:26,205 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:26,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:36:26,205 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:26,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1431220781, now seen corresponding path program 38 times [2022-01-31 19:36:26,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:26,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112934658] [2022-01-31 19:36:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:26,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:26,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:26,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:26,208 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:26,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:26,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:26,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112934658] [2022-01-31 19:36:26,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112934658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:26,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:26,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:36:26,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839712818] [2022-01-31 19:36:26,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:26,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:36:26,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:26,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:36:26,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:36:26,582 INFO L87 Difference]: Start difference. First operand 215 states and 221 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:27,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:27,498 INFO L93 Difference]: Finished difference Result 222 states and 228 transitions. [2022-01-31 19:36:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:36:27,498 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 154 [2022-01-31 19:36:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:27,499 INFO L225 Difference]: With dead ends: 222 [2022-01-31 19:36:27,499 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 19:36:27,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=750, Invalid=2790, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:36:27,500 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 320 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:27,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 59 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:36:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 19:36:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-01-31 19:36:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0320512820512822) internal successors, (161), 156 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-01-31 19:36:27,618 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 154 [2022-01-31 19:36:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:27,618 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-01-31 19:36:27,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-01-31 19:36:27,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 19:36:27,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:27,619 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:27,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:36:27,619 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:27,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1209215751, now seen corresponding path program 39 times [2022-01-31 19:36:27,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:27,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839445419] [2022-01-31 19:36:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:27,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:27,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:27,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:27,623 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:52,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:52,817 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:52,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839445419] [2022-01-31 19:36:52,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [839445419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:52,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:52,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 19:36:52,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824764222] [2022-01-31 19:36:52,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:52,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 19:36:52,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 19:36:52,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2008, Invalid=19748, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 19:36:52,820 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 148 states, 148 states have (on average 1.054054054054054) internal successors, (156), 146 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:14,613 INFO L93 Difference]: Finished difference Result 266 states and 275 transitions. [2022-01-31 19:37:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-31 19:37:14,613 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.054054054054054) internal successors, (156), 146 states have internal predecessors, (156), 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 160 [2022-01-31 19:37:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:14,614 INFO L225 Difference]: With dead ends: 266 [2022-01-31 19:37:14,615 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 19:37:14,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20029 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=4914, Invalid=53892, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 19:37:14,618 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 5744 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 6340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 5744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:14,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 192 Invalid, 6340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 5744 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-31 19:37:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 19:37:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 226. [2022-01-31 19:37:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0361990950226245) internal successors, (229), 221 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 19:37:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2022-01-31 19:37:14,788 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 160 [2022-01-31 19:37:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:14,788 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2022-01-31 19:37:14,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.054054054054054) internal successors, (156), 146 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2022-01-31 19:37:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 19:37:14,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:14,789 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:14,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:37:14,789 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:14,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1796789787, now seen corresponding path program 40 times [2022-01-31 19:37:14,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:14,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395503920] [2022-01-31 19:37:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:14,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:14,793 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:14,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:14,800 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:15,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:15,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395503920] [2022-01-31 19:37:15,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [395503920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:15,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:15,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:37:15,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971136392] [2022-01-31 19:37:15,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:15,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:37:15,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:15,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:37:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=845, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:37:15,303 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:16,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:16,414 INFO L93 Difference]: Finished difference Result 458 states and 474 transitions. [2022-01-31 19:37:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:37:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 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 162 [2022-01-31 19:37:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:16,416 INFO L225 Difference]: With dead ends: 458 [2022-01-31 19:37:16,416 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 19:37:16,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=533, Invalid=1819, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:37:16,417 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 480 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:16,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 53 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:37:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 19:37:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2022-01-31 19:37:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.03125) internal successors, (231), 224 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 235 transitions. [2022-01-31 19:37:16,648 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 235 transitions. Word has length 162 [2022-01-31 19:37:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:16,648 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 235 transitions. [2022-01-31 19:37:16,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 235 transitions. [2022-01-31 19:37:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:37:16,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:16,650 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:16,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:37:16,650 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:16,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:16,650 INFO L85 PathProgramCache]: Analyzing trace with hash -187000317, now seen corresponding path program 41 times [2022-01-31 19:37:16,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:16,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816399900] [2022-01-31 19:37:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:16,653 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:16,653 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:16,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:16,654 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:17,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:17,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816399900] [2022-01-31 19:37:17,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816399900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:17,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:17,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:37:17,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243800909] [2022-01-31 19:37:17,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:17,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:37:17,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:37:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:37:17,050 INFO L87 Difference]: Start difference. First operand 229 states and 235 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:18,128 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2022-01-31 19:37:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:37:18,129 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 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 164 [2022-01-31 19:37:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:18,129 INFO L225 Difference]: With dead ends: 236 [2022-01-31 19:37:18,129 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 19:37:18,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=855, Invalid=3177, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:37:18,130 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 331 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:18,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 63 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:37:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 19:37:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-01-31 19:37:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0301204819277108) internal successors, (171), 166 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 19:37:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-01-31 19:37:18,257 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 164 [2022-01-31 19:37:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:18,259 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-01-31 19:37:18,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-01-31 19:37:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 19:37:18,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:18,260 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:18,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:37:18,260 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash 330242653, now seen corresponding path program 42 times [2022-01-31 19:37:18,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:18,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294537148] [2022-01-31 19:37:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:18,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:18,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:18,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:18,264 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:51,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:51,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:51,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294537148] [2022-01-31 19:37:51,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294537148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:51,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:51,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-01-31 19:37:51,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178266822] [2022-01-31 19:37:51,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:51,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-01-31 19:37:51,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:51,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-01-31 19:37:51,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1538, Invalid=23268, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 19:37:51,606 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 158 states, 158 states have (on average 1.0506329113924051) internal successors, (166), 156 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:28,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:28,942 INFO L93 Difference]: Finished difference Result 281 states and 290 transitions. [2022-01-31 19:38:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-01-31 19:38:28,942 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.0506329113924051) internal successors, (166), 156 states have internal predecessors, (166), 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 170 [2022-01-31 19:38:28,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:28,943 INFO L225 Difference]: With dead ends: 281 [2022-01-31 19:38:28,943 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 19:38:28,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21002 ImplicationChecksByTransitivity, 51.7s TimeCoverageRelationStatistics Valid=6023, Invalid=74917, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 19:38:28,946 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 8363 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 8898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 8363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:28,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 298 Invalid, 8898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 8363 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-01-31 19:38:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 19:38:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 240. [2022-01-31 19:38:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 235 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 247 transitions. [2022-01-31 19:38:29,126 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 247 transitions. Word has length 170 [2022-01-31 19:38:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:29,126 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 247 transitions. [2022-01-31 19:38:29,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.0506329113924051) internal successors, (166), 156 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 247 transitions. [2022-01-31 19:38:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:38:29,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:29,127 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:29,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:38:29,128 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:29,128 INFO L85 PathProgramCache]: Analyzing trace with hash 434858939, now seen corresponding path program 43 times [2022-01-31 19:38:29,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:29,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850051371] [2022-01-31 19:38:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:29,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:29,129 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:29,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:29,131 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:29,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:29,522 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:29,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850051371] [2022-01-31 19:38:29,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1850051371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:29,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:29,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:38:29,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59356653] [2022-01-31 19:38:29,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:29,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:38:29,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:38:29,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:38:29,523 INFO L87 Difference]: Start difference. First operand 240 states and 247 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:30,546 INFO L93 Difference]: Finished difference Result 486 states and 502 transitions. [2022-01-31 19:38:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:38:30,546 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 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 172 [2022-01-31 19:38:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:30,547 INFO L225 Difference]: With dead ends: 486 [2022-01-31 19:38:30,547 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 19:38:30,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:38:30,548 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 514 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:30,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 47 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:38:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 19:38:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2022-01-31 19:38:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0294117647058822) internal successors, (245), 238 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 249 transitions. [2022-01-31 19:38:30,799 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 249 transitions. Word has length 172 [2022-01-31 19:38:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:30,799 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 249 transitions. [2022-01-31 19:38:30,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 249 transitions. [2022-01-31 19:38:30,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:38:30,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:30,800 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:30,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:38:30,800 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1843270055, now seen corresponding path program 44 times [2022-01-31 19:38:30,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:30,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766406443] [2022-01-31 19:38:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:30,802 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:30,803 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:30,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:30,804 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:31,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:31,210 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:31,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766406443] [2022-01-31 19:38:31,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1766406443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:31,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:31,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:38:31,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384146983] [2022-01-31 19:38:31,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:31,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:38:31,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:38:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:38:31,212 INFO L87 Difference]: Start difference. First operand 243 states and 249 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:32,309 INFO L93 Difference]: Finished difference Result 250 states and 256 transitions. [2022-01-31 19:38:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:38:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 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 174 [2022-01-31 19:38:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:32,310 INFO L225 Difference]: With dead ends: 250 [2022-01-31 19:38:32,310 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 19:38:32,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=967, Invalid=3589, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:38:32,311 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 335 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:32,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 73 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:38:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 19:38:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-01-31 19:38:32,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0284090909090908) internal successors, (181), 176 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2022-01-31 19:38:32,465 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 174 [2022-01-31 19:38:32,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:32,465 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2022-01-31 19:38:32,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:32,465 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2022-01-31 19:38:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 19:38:32,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:32,466 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:32,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:38:32,466 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:32,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:32,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1459939789, now seen corresponding path program 45 times [2022-01-31 19:38:32,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:32,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192593589] [2022-01-31 19:38:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:32,467 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:32,467 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:32,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:32,469 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:04,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:04,051 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:04,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192593589] [2022-01-31 19:39:04,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [192593589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:04,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:04,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-01-31 19:39:04,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525136012] [2022-01-31 19:39:04,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:04,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-01-31 19:39:04,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-01-31 19:39:04,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2176, Invalid=25880, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 19:39:04,053 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand has 168 states, 168 states have (on average 1.0476190476190477) internal successors, (176), 166 states have internal predecessors, (176), 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 19:39:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:52,852 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2022-01-31 19:39:52,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-01-31 19:39:52,853 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 1.0476190476190477) internal successors, (176), 166 states have internal predecessors, (176), 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 180 [2022-01-31 19:39:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:52,854 INFO L225 Difference]: With dead ends: 299 [2022-01-31 19:39:52,854 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 19:39:52,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36238 ImplicationChecksByTransitivity, 60.1s TimeCoverageRelationStatistics Valid=12791, Invalid=100441, Unknown=0, NotChecked=0, Total=113232 [2022-01-31 19:39:52,860 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 7773 mSolverCounterSat, 1182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 8955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1182 IncrementalHoareTripleChecker+Valid, 7773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:52,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 220 Invalid, 8955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1182 Valid, 7773 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-01-31 19:39:52,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 19:39:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 254. [2022-01-31 19:39:53,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.0321285140562249) internal successors, (257), 249 states have internal predecessors, (257), 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 19:39:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 261 transitions. [2022-01-31 19:39:53,129 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 261 transitions. Word has length 180 [2022-01-31 19:39:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:53,129 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 261 transitions. [2022-01-31 19:39:53,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 1.0476190476190477) internal successors, (176), 166 states have internal predecessors, (176), 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 19:39:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 261 transitions. [2022-01-31 19:39:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 19:39:53,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:53,130 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:39:53,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:39:53,130 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1751292433, now seen corresponding path program 46 times [2022-01-31 19:39:53,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:53,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510571749] [2022-01-31 19:39:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:53,132 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:53,132 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:53,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:53,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:53,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:53,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:53,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510571749] [2022-01-31 19:39:53,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [510571749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:53,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:53,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:39:53,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423342732] [2022-01-31 19:39:53,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:53,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:39:53,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:53,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:39:53,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:39:53,582 INFO L87 Difference]: Start difference. First operand 254 states and 261 transitions. Second operand has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:54,826 INFO L93 Difference]: Finished difference Result 514 states and 530 transitions. [2022-01-31 19:39:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:39:54,826 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-01-31 19:39:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:54,827 INFO L225 Difference]: With dead ends: 514 [2022-01-31 19:39:54,827 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 19:39:54,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:39:54,830 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 585 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:54,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 41 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:39:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 19:39:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 257. [2022-01-31 19:39:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0277777777777777) internal successors, (259), 252 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 19:39:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 263 transitions. [2022-01-31 19:39:55,163 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 263 transitions. Word has length 182 [2022-01-31 19:39:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:55,164 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 263 transitions. [2022-01-31 19:39:55,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 263 transitions. [2022-01-31 19:39:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 19:39:55,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:55,165 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:39:55,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:39:55,165 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1173294895, now seen corresponding path program 47 times [2022-01-31 19:39:55,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:55,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656468855] [2022-01-31 19:39:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:55,167 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:55,167 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:55,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:55,169 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:55,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:55,692 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:55,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656468855] [2022-01-31 19:39:55,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [656468855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:55,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:55,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:39:55,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434061981] [2022-01-31 19:39:55,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:55,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:39:55,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:55,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:39:55,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:39:55,694 INFO L87 Difference]: Start difference. First operand 257 states and 263 transitions. Second operand has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:56,942 INFO L93 Difference]: Finished difference Result 264 states and 270 transitions. [2022-01-31 19:39:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:39:56,942 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-01-31 19:39:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:56,943 INFO L225 Difference]: With dead ends: 264 [2022-01-31 19:39:56,943 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 19:39:56,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1086, Invalid=4026, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:39:56,945 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 427 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:56,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 53 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:39:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 19:39:57,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-31 19:39:57,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0268817204301075) internal successors, (191), 186 states have internal predecessors, (191), 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 19:39:57,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 195 transitions. [2022-01-31 19:39:57,145 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 195 transitions. Word has length 184 [2022-01-31 19:39:57,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:57,145 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 195 transitions. [2022-01-31 19:39:57,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:57,146 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 195 transitions. [2022-01-31 19:39:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 19:39:57,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:57,147 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:39:57,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:39:57,147 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:57,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:57,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1299807881, now seen corresponding path program 48 times [2022-01-31 19:39:57,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:57,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40221056] [2022-01-31 19:39:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:57,149 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:57,149 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:57,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:57,150 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:32,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:32,644 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:32,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40221056] [2022-01-31 19:40:32,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [40221056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:32,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:32,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [179] imperfect sequences [] total 179 [2022-01-31 19:40:32,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682804655] [2022-01-31 19:40:32,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:32,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2022-01-31 19:40:32,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:32,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2022-01-31 19:40:32,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2845, Invalid=29017, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 19:40:32,648 INFO L87 Difference]: Start difference. First operand 191 states and 195 transitions. Second operand has 179 states, 179 states have (on average 1.0391061452513966) internal successors, (186), 177 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:57,670 INFO L93 Difference]: Finished difference Result 314 states and 323 transitions. [2022-01-31 19:40:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-01-31 19:40:57,670 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 1.0391061452513966) internal successors, (186), 177 states have internal predecessors, (186), 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 190 [2022-01-31 19:40:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:57,671 INFO L225 Difference]: With dead ends: 314 [2022-01-31 19:40:57,671 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 19:40:57,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24716 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=4914, Invalid=66108, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 19:40:57,674 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 9008 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 9671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 9008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:57,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 255 Invalid, 9671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 9008 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-01-31 19:40:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 19:40:57,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2022-01-31 19:40:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.0304182509505704) internal successors, (271), 263 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 275 transitions. [2022-01-31 19:40:57,939 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 275 transitions. Word has length 190 [2022-01-31 19:40:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:57,940 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 275 transitions. [2022-01-31 19:40:57,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 1.0391061452513966) internal successors, (186), 177 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:57,942 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 275 transitions. [2022-01-31 19:40:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 19:40:57,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:57,943 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:57,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:40:57,944 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:57,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1783163673, now seen corresponding path program 49 times [2022-01-31 19:40:57,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:57,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581253396] [2022-01-31 19:40:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:57,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:57,946 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:57,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:57,948 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:58,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:58,396 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:58,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581253396] [2022-01-31 19:40:58,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [581253396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:58,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:58,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:40:58,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702497055] [2022-01-31 19:40:58,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:58,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:40:58,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:58,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:40:58,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:40:58,397 INFO L87 Difference]: Start difference. First operand 268 states and 275 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:59,649 INFO L93 Difference]: Finished difference Result 542 states and 558 transitions. [2022-01-31 19:40:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:40:59,649 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-01-31 19:40:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:59,650 INFO L225 Difference]: With dead ends: 542 [2022-01-31 19:40:59,650 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 19:40:59,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=746, Invalid=2560, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:40:59,651 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 630 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 658 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 658 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:59,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 47 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [658 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:40:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 19:40:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2022-01-31 19:40:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0263157894736843) internal successors, (273), 266 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 19:40:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 277 transitions. [2022-01-31 19:40:59,997 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 277 transitions. Word has length 192 [2022-01-31 19:40:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:59,997 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 277 transitions. [2022-01-31 19:40:59,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 277 transitions. [2022-01-31 19:40:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 19:40:59,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:59,998 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:59,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:40:59,999 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:59,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2053874555, now seen corresponding path program 50 times [2022-01-31 19:40:59,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:59,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289410252] [2022-01-31 19:40:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:00,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:00,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:00,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:00,003 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:00,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:00,472 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:00,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289410252] [2022-01-31 19:41:00,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [289410252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:00,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:00,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:41:00,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840769547] [2022-01-31 19:41:00,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:00,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:41:00,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:00,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:41:00,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:41:00,474 INFO L87 Difference]: Start difference. First operand 271 states and 277 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:01,783 INFO L93 Difference]: Finished difference Result 278 states and 284 transitions. [2022-01-31 19:41:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:41:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-01-31 19:41:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:01,785 INFO L225 Difference]: With dead ends: 278 [2022-01-31 19:41:01,785 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 19:41:01,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1212, Invalid=4488, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:41:01,786 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 379 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:01,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 75 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:41:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 19:41:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-01-31 19:41:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0255102040816326) internal successors, (201), 196 states have internal predecessors, (201), 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 19:41:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-01-31 19:41:01,979 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 194 [2022-01-31 19:41:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:01,980 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-01-31 19:41:01,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-01-31 19:41:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 19:41:01,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:01,980 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:01,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:41:01,981 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1657490593, now seen corresponding path program 51 times [2022-01-31 19:41:01,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:01,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199800425] [2022-01-31 19:41:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:01,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:01,982 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:01,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:01,984 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:38,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:38,598 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:38,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199800425] [2022-01-31 19:41:38,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [199800425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:38,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:38,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [190] imperfect sequences [] total 190 [2022-01-31 19:41:38,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105543465] [2022-01-31 19:41:38,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:38,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-01-31 19:41:38,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-01-31 19:41:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2486, Invalid=33424, Unknown=0, NotChecked=0, Total=35910 [2022-01-31 19:41:38,601 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 190 states, 190 states have (on average 1.0315789473684212) internal successors, (196), 188 states have internal predecessors, (196), 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 19:42:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:05,609 INFO L93 Difference]: Finished difference Result 328 states and 336 transitions. [2022-01-31 19:42:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-01-31 19:42:05,609 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 1.0315789473684212) internal successors, (196), 188 states have internal predecessors, (196), 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 200 [2022-01-31 19:42:05,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:05,610 INFO L225 Difference]: With dead ends: 328 [2022-01-31 19:42:05,610 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 19:42:05,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23202 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=3426, Invalid=68130, Unknown=0, NotChecked=0, Total=71556 [2022-01-31 19:42:05,613 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 11719 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 12199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 11719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:05,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 468 Invalid, 12199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 11719 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-01-31 19:42:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 19:42:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 282. [2022-01-31 19:42:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.0288808664259927) internal successors, (285), 277 states have internal predecessors, (285), 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 19:42:05,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 289 transitions. [2022-01-31 19:42:05,907 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 289 transitions. Word has length 200 [2022-01-31 19:42:05,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:05,907 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 289 transitions. [2022-01-31 19:42:05,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 1.0315789473684212) internal successors, (196), 188 states have internal predecessors, (196), 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 19:42:05,908 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 289 transitions. [2022-01-31 19:42:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 19:42:05,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:05,909 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:05,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:42:05,909 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash -874824643, now seen corresponding path program 52 times [2022-01-31 19:42:05,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:05,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908802506] [2022-01-31 19:42:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:05,911 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:05,911 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:05,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:05,913 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:06,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:06,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:06,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908802506] [2022-01-31 19:42:06,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [908802506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:06,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:06,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:42:06,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015995857] [2022-01-31 19:42:06,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:06,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:42:06,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:06,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:42:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:42:06,417 INFO L87 Difference]: Start difference. First operand 282 states and 289 transitions. Second operand has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:07,777 INFO L93 Difference]: Finished difference Result 570 states and 586 transitions. [2022-01-31 19:42:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:42:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-01-31 19:42:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:07,778 INFO L225 Difference]: With dead ends: 570 [2022-01-31 19:42:07,778 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 19:42:07,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=825, Invalid=2835, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:42:07,780 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 601 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:07,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 45 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:42:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 19:42:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 285. [2022-01-31 19:42:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.025) internal successors, (287), 280 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 291 transitions. [2022-01-31 19:42:08,086 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 291 transitions. Word has length 202 [2022-01-31 19:42:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:08,086 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 291 transitions. [2022-01-31 19:42:08,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 291 transitions. [2022-01-31 19:42:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 19:42:08,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:08,087 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:08,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:42:08,087 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1729350053, now seen corresponding path program 53 times [2022-01-31 19:42:08,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:08,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225853007] [2022-01-31 19:42:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:08,089 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:08,089 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:08,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:08,091 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:08,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:08,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:08,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225853007] [2022-01-31 19:42:08,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [225853007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:08,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:08,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:42:08,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618090701] [2022-01-31 19:42:08,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:08,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:42:08,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:42:08,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:42:08,614 INFO L87 Difference]: Start difference. First operand 285 states and 291 transitions. Second operand has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:10,037 INFO L93 Difference]: Finished difference Result 292 states and 298 transitions. [2022-01-31 19:42:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:42:10,038 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2022-01-31 19:42:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:10,038 INFO L225 Difference]: With dead ends: 292 [2022-01-31 19:42:10,038 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 19:42:10,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1345, Invalid=4975, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:42:10,039 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 440 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1877 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 1877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:10,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 59 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 1877 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:42:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 19:42:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-01-31 19:42:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0242718446601942) internal successors, (211), 206 states have internal predecessors, (211), 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 19:42:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2022-01-31 19:42:10,270 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 204 [2022-01-31 19:42:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:10,270 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2022-01-31 19:42:10,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2022-01-31 19:42:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:42:10,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:10,271 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:10,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:42:10,271 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:10,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:10,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2134960971, now seen corresponding path program 54 times [2022-01-31 19:42:10,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:10,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423189444] [2022-01-31 19:42:10,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:10,273 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:10,273 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:10,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:10,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:55,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:55,247 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:55,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423189444] [2022-01-31 19:42:55,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [423189444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:55,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:55,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [199] imperfect sequences [] total 199 [2022-01-31 19:42:55,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454344735] [2022-01-31 19:42:55,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:55,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2022-01-31 19:42:55,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:55,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2022-01-31 19:42:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2804, Invalid=36598, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 19:42:55,250 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 199 states, 199 states have (on average 1.035175879396985) internal successors, (206), 197 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:46,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:46,053 INFO L93 Difference]: Finished difference Result 345 states and 354 transitions. [2022-01-31 19:43:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-01-31 19:43:46,053 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 199 states have (on average 1.035175879396985) internal successors, (206), 197 states have internal predecessors, (206), 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 19:43:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:46,054 INFO L225 Difference]: With dead ends: 345 [2022-01-31 19:43:46,054 INFO L226 Difference]: Without dead ends: 340 [2022-01-31 19:43:46,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38509 ImplicationChecksByTransitivity, 72.1s TimeCoverageRelationStatistics Valid=10725, Invalid=122135, Unknown=0, NotChecked=0, Total=132860 [2022-01-31 19:43:46,059 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 9984 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 10910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 926 IncrementalHoareTripleChecker+Valid, 9984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:46,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 231 Invalid, 10910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 9984 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-01-31 19:43:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-31 19:43:46,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 296. [2022-01-31 19:43:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.0274914089347078) internal successors, (299), 291 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 303 transitions. [2022-01-31 19:43:46,406 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 303 transitions. Word has length 210 [2022-01-31 19:43:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:46,406 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 303 transitions. [2022-01-31 19:43:46,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 199 states have (on average 1.035175879396985) internal successors, (206), 197 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 303 transitions. [2022-01-31 19:43:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 19:43:46,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:46,407 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:46,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:43:46,407 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1085706221, now seen corresponding path program 55 times [2022-01-31 19:43:46,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:46,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890535535] [2022-01-31 19:43:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:46,409 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:46,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:46,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:46,411 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:46,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:46,975 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:46,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890535535] [2022-01-31 19:43:46,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [890535535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:46,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:46,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:43:46,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324548387] [2022-01-31 19:43:46,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:46,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:43:46,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:43:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:43:46,976 INFO L87 Difference]: Start difference. First operand 296 states and 303 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:48,482 INFO L93 Difference]: Finished difference Result 598 states and 614 transitions. [2022-01-31 19:43:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:43:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2022-01-31 19:43:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:48,483 INFO L225 Difference]: With dead ends: 598 [2022-01-31 19:43:48,483 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 19:43:48,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=908, Invalid=3124, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:43:48,484 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 731 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:48,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 47 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:43:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 19:43:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 299. [2022-01-31 19:43:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0238095238095237) internal successors, (301), 294 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 305 transitions. [2022-01-31 19:43:48,843 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 305 transitions. Word has length 212 [2022-01-31 19:43:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:48,843 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 305 transitions. [2022-01-31 19:43:48,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 305 transitions. [2022-01-31 19:43:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 19:43:48,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:48,844 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:48,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:43:48,844 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:48,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1873216335, now seen corresponding path program 56 times [2022-01-31 19:43:48,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:48,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80286317] [2022-01-31 19:43:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:48,846 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:48,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:48,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:48,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:49,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:49,397 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:49,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80286317] [2022-01-31 19:43:49,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [80286317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:49,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:49,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:43:49,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79761451] [2022-01-31 19:43:49,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:49,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:43:49,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:49,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:43:49,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:43:49,398 INFO L87 Difference]: Start difference. First operand 299 states and 305 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:51,098 INFO L93 Difference]: Finished difference Result 306 states and 312 transitions. [2022-01-31 19:43:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:43:51,099 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 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 214 [2022-01-31 19:43:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:51,099 INFO L225 Difference]: With dead ends: 306 [2022-01-31 19:43:51,100 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 19:43:51,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=5487, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:43:51,115 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 487 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:51,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 63 Invalid, 2326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:43:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 19:43:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-01-31 19:43:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0231481481481481) internal successors, (221), 216 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2022-01-31 19:43:51,452 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 214 [2022-01-31 19:43:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:51,452 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2022-01-31 19:43:51,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2022-01-31 19:43:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 19:43:51,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:51,454 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:51,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:43:51,454 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1556938101, now seen corresponding path program 57 times [2022-01-31 19:43:51,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:51,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250550849] [2022-01-31 19:43:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:51,468 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:51,468 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:51,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:51,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:48,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:48,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:48,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250550849] [2022-01-31 19:44:48,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1250550849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:48,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:48,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [209] imperfect sequences [] total 209 [2022-01-31 19:44:48,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380542195] [2022-01-31 19:44:48,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:48,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 209 states [2022-01-31 19:44:48,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2022-01-31 19:44:48,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4156, Invalid=39316, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 19:44:48,801 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 209 states, 209 states have (on average 1.0334928229665072) internal successors, (216), 207 states have internal predecessors, (216), 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)