/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-lopstr16/single_elem_safe.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:01:22,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:01:22,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:01:22,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:01:22,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:01:22,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:01:22,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:01:22,168 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 20:01:22,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:01:22,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:01:22,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:01:22,180 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:01:22,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:01:22,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:01:22,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:01:22,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:01:22,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:01:22,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:01:22,181 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:01:22,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:01:22,182 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:01:22,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:01:22,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:01:22,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:01:22,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:01:22,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:01:22,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:01:22,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:01:22,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:01:22,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:01:22,183 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:01:22,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:01:22,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:01:22,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:01:22,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:01:22,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:01:22,433 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:01:22,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/single_elem_safe.i [2022-01-31 20:01:22,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ccf8105/c6d87a02d5e546648b06ec1b5b284fb2/FLAG2c6abf447 [2022-01-31 20:01:22,917 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:01:22,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/single_elem_safe.i [2022-01-31 20:01:22,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ccf8105/c6d87a02d5e546648b06ec1b5b284fb2/FLAG2c6abf447 [2022-01-31 20:01:23,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ccf8105/c6d87a02d5e546648b06ec1b5b284fb2 [2022-01-31 20:01:23,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:01:23,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:01:23,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:01:23,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:01:23,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:01:23,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:01:23" (1/1) ... [2022-01-31 20:01:23,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a2596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23, skipping insertion in model container [2022-01-31 20:01:23,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:01:23" (1/1) ... [2022-01-31 20:01:23,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:01:23,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:01:23,452 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-lopstr16/single_elem_safe.i[809,822] [2022-01-31 20:01:23,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:01:23,483 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:01:23,500 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-lopstr16/single_elem_safe.i[809,822] [2022-01-31 20:01:23,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:01:23,537 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:01:23,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23 WrapperNode [2022-01-31 20:01:23,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:01:23,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:01:23,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:01:23,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:01:23,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23" (1/1) ... [2022-01-31 20:01:23,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23" (1/1) ... [2022-01-31 20:01:23,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23" (1/1) ... [2022-01-31 20:01:23,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23" (1/1) ... [2022-01-31 20:01:23,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23" (1/1) ... [2022-01-31 20:01:23,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23" (1/1) ... [2022-01-31 20:01:23,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23" (1/1) ... [2022-01-31 20:01:23,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:01:23,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:01:23,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:01:23,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:01:23,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23" (1/1) ... [2022-01-31 20:01:23,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:01:23,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:01:23,617 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 20:01:23,619 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 20:01:23,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:01:23,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:01:23,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:01:23,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:01:23,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:01:23,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:01:23,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:01:23,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:01:23,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:01:23,656 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:01:23,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:01:23,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:01:23,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 20:01:23,657 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 20:01:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:01:23,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 20:01:23,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:01:23,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:01:23,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-31 20:01:23,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-31 20:01:23,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:01:23,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:01:23,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:01:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:01:23,734 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:01:23,735 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:01:23,926 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:01:23,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:01:23,948 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 20:01:23,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:01:23 BoogieIcfgContainer [2022-01-31 20:01:23,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:01:23,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:01:23,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:01:23,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:01:23,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:01:23" (1/3) ... [2022-01-31 20:01:23,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be6adcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:01:23, skipping insertion in model container [2022-01-31 20:01:23,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:01:23" (2/3) ... [2022-01-31 20:01:23,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be6adcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:01:23, skipping insertion in model container [2022-01-31 20:01:23,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:01:23" (3/3) ... [2022-01-31 20:01:23,957 INFO L111 eAbstractionObserver]: Analyzing ICFG single_elem_safe.i [2022-01-31 20:01:23,961 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:01:23,961 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:01:24,021 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:01:24,043 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 20:01:24,043 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:01:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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 20:01:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:01:24,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:24,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:24,076 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:24,080 INFO L85 PathProgramCache]: Analyzing trace with hash 489156156, now seen corresponding path program 1 times [2022-01-31 20:01:24,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:24,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037878539] [2022-01-31 20:01:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:24,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:24,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:24,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:24,345 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:24,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037878539] [2022-01-31 20:01:24,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037878539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:24,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:24,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:01:24,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560296957] [2022-01-31 20:01:24,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:24,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:01:24,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:01:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:01:24,383 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:24,483 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-01-31 20:01:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:01:24,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-01-31 20:01:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:24,496 INFO L225 Difference]: With dead ends: 54 [2022-01-31 20:01:24,496 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 20:01:24,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:01:24,502 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:24,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:01:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 20:01:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-01-31 20:01:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-01-31 20:01:24,548 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2022-01-31 20:01:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:24,549 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-01-31 20:01:24,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-01-31 20:01:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:01:24,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:24,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:24,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:01:24,552 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:24,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1569122525, now seen corresponding path program 1 times [2022-01-31 20:01:24,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:24,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287276632] [2022-01-31 20:01:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:24,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:24,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:24,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:24,681 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:24,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287276632] [2022-01-31 20:01:24,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [287276632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:24,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:24,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:01:24,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623892410] [2022-01-31 20:01:24,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:24,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:01:24,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:24,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:01:24,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:01:24,685 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 20:01:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:24,826 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-01-31 20:01:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:01:24,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 20:01:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:24,828 INFO L225 Difference]: With dead ends: 53 [2022-01-31 20:01:24,828 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 20:01:24,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:01:24,829 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:24,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 38 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:01:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 20:01:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2022-01-31 20:01:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-01-31 20:01:24,840 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-01-31 20:01:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:24,841 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-01-31 20:01:24,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 20:01:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-01-31 20:01:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 20:01:24,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:24,842 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 20:01:24,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:01:24,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:24,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1362700382, now seen corresponding path program 1 times [2022-01-31 20:01:24,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:24,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616084808] [2022-01-31 20:01:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:24,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 13 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:01:24,909 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:01:24,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:24,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:25,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:25,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616084808] [2022-01-31 20:01:25,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616084808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:25,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:25,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:01:25,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697080409] [2022-01-31 20:01:25,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:25,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:01:25,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:25,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:01:25,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:01:25,156 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:25,273 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2022-01-31 20:01:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:01:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 20:01:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:25,274 INFO L225 Difference]: With dead ends: 50 [2022-01-31 20:01:25,275 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 20:01:25,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:01:25,276 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:25,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 41 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-01-31 20:01:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 20:01:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-01-31 20:01:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-01-31 20:01:25,284 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2022-01-31 20:01:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:25,284 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-01-31 20:01:25,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-01-31 20:01:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 20:01:25,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:25,285 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 20:01:25,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:01:25,286 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:25,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1949506396, now seen corresponding path program 1 times [2022-01-31 20:01:25,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:25,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618702286] [2022-01-31 20:01:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:25,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:25,290 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:25,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:25,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:25,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:25,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618702286] [2022-01-31 20:01:25,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [618702286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:25,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:25,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:01:25,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851404825] [2022-01-31 20:01:25,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:25,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:01:25,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:25,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:01:25,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:01:25,366 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:25,479 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-01-31 20:01:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:01:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 20:01:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:25,481 INFO L225 Difference]: With dead ends: 65 [2022-01-31 20:01:25,481 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 20:01:25,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:01:25,483 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:25,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 51 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:01:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 20:01:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2022-01-31 20:01:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-01-31 20:01:25,493 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2022-01-31 20:01:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:25,493 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-01-31 20:01:25,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:25,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-01-31 20:01:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 20:01:25,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:25,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:25,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:01:25,495 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:25,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1324110529, now seen corresponding path program 1 times [2022-01-31 20:01:25,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:25,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487412628] [2022-01-31 20:01:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:25,499 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:25,499 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:25,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:25,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:25,545 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:25,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487412628] [2022-01-31 20:01:25,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487412628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:25,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:25,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:01:25,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389677495] [2022-01-31 20:01:25,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:25,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:01:25,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:25,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:01:25,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:01:25,547 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:25,616 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2022-01-31 20:01:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:01:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 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 25 [2022-01-31 20:01:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:25,618 INFO L225 Difference]: With dead ends: 69 [2022-01-31 20:01:25,618 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 20:01:25,618 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 20:01:25,619 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:25,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:01:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 20:01:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2022-01-31 20:01:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-01-31 20:01:25,630 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 25 [2022-01-31 20:01:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:25,630 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-01-31 20:01:25,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-01-31 20:01:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 20:01:25,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:25,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:25,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:01:25,631 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:25,632 INFO L85 PathProgramCache]: Analyzing trace with hash 737304515, now seen corresponding path program 2 times [2022-01-31 20:01:25,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:25,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936284120] [2022-01-31 20:01:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:25,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:25,635 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:25,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:25,637 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:25,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:25,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936284120] [2022-01-31 20:01:25,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1936284120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:25,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:25,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:01:25,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676291500] [2022-01-31 20:01:25,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:25,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:01:25,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:25,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:01:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:01:25,743 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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 20:01:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:25,920 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2022-01-31 20:01:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:01:25,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 20:01:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:25,923 INFO L225 Difference]: With dead ends: 80 [2022-01-31 20:01:25,924 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 20:01:25,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:01:25,927 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:25,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 61 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:01:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 20:01:25,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2022-01-31 20:01:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-01-31 20:01:25,953 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 25 [2022-01-31 20:01:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:25,953 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-01-31 20:01:25,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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 20:01:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-01-31 20:01:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 20:01:25,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:25,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:25,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:01:25,955 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:25,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:25,956 INFO L85 PathProgramCache]: Analyzing trace with hash -202899452, now seen corresponding path program 3 times [2022-01-31 20:01:25,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:25,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961987592] [2022-01-31 20:01:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:25,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:25,959 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:25,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:25,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:26,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:26,063 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:26,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961987592] [2022-01-31 20:01:26,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1961987592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:26,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:26,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:01:26,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685419072] [2022-01-31 20:01:26,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:26,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:01:26,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:26,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:01:26,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:01:26,065 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 20:01:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:26,209 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-01-31 20:01:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:01:26,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 20:01:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:26,211 INFO L225 Difference]: With dead ends: 93 [2022-01-31 20:01:26,211 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 20:01:26,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:01:26,212 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:26,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 77 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:01:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 20:01:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2022-01-31 20:01:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2022-01-31 20:01:26,225 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 30 [2022-01-31 20:01:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:26,225 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2022-01-31 20:01:26,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 20:01:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2022-01-31 20:01:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 20:01:26,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:26,227 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:26,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:01:26,227 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:26,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1398890595, now seen corresponding path program 4 times [2022-01-31 20:01:26,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:26,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903800129] [2022-01-31 20:01:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:26,230 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:26,230 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:26,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:26,231 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:26,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:26,358 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:26,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903800129] [2022-01-31 20:01:26,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1903800129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:26,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:26,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:01:26,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916448096] [2022-01-31 20:01:26,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:26,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:01:26,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:01:26,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:01:26,360 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 7 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 20:01:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:26,515 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-01-31 20:01:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:01:26,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 7 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) Word has length 35 [2022-01-31 20:01:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:26,516 INFO L225 Difference]: With dead ends: 106 [2022-01-31 20:01:26,516 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 20:01:26,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:01:26,517 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 148 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:26,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 83 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:01:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 20:01:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2022-01-31 20:01:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2022-01-31 20:01:26,535 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 35 [2022-01-31 20:01:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:26,536 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2022-01-31 20:01:26,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 7 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 20:01:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2022-01-31 20:01:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 20:01:26,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:26,537 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:26,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:01:26,537 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:26,538 INFO L85 PathProgramCache]: Analyzing trace with hash 719348580, now seen corresponding path program 5 times [2022-01-31 20:01:26,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:26,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119902496] [2022-01-31 20:01:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:26,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:26,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:26,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:26,542 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:26,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:26,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:26,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119902496] [2022-01-31 20:01:26,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2119902496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:26,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:26,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:01:26,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395684046] [2022-01-31 20:01:26,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:26,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:01:26,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:26,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:01:26,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:01:26,663 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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 20:01:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:26,846 INFO L93 Difference]: Finished difference Result 119 states and 165 transitions. [2022-01-31 20:01:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:01:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 20:01:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:26,847 INFO L225 Difference]: With dead ends: 119 [2022-01-31 20:01:26,847 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 20:01:26,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:01:26,848 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 145 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:26,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 97 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:01:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 20:01:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 62. [2022-01-31 20:01:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2022-01-31 20:01:26,890 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 40 [2022-01-31 20:01:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:26,890 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2022-01-31 20:01:26,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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 20:01:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2022-01-31 20:01:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 20:01:26,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:26,892 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:26,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:01:26,892 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:26,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1258297603, now seen corresponding path program 6 times [2022-01-31 20:01:26,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:26,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627863605] [2022-01-31 20:01:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:26,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:26,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:26,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:26,897 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:27,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:27,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:27,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627863605] [2022-01-31 20:01:27,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627863605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:27,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:27,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:01:27,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630077918] [2022-01-31 20:01:27,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:27,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:01:27,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:27,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:01:27,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:01:27,032 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 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 20:01:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:27,238 INFO L93 Difference]: Finished difference Result 132 states and 184 transitions. [2022-01-31 20:01:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:01:27,238 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 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) Word has length 45 [2022-01-31 20:01:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:27,239 INFO L225 Difference]: With dead ends: 132 [2022-01-31 20:01:27,239 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 20:01:27,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:01:27,241 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 195 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:27,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 108 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:01:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 20:01:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 69. [2022-01-31 20:01:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 63 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2022-01-31 20:01:27,278 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 45 [2022-01-31 20:01:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:27,281 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2022-01-31 20:01:27,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 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 20:01:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2022-01-31 20:01:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 20:01:27,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:27,285 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:27,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:01:27,285 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1388056260, now seen corresponding path program 7 times [2022-01-31 20:01:27,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:27,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073293649] [2022-01-31 20:01:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:27,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:27,290 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:27,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:27,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:27,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:27,463 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073293649] [2022-01-31 20:01:27,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2073293649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:27,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:27,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:01:27,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408722991] [2022-01-31 20:01:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:27,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:01:27,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:01:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:01:27,465 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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 20:01:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:27,683 INFO L93 Difference]: Finished difference Result 145 states and 203 transitions. [2022-01-31 20:01:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:01:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 20:01:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:27,684 INFO L225 Difference]: With dead ends: 145 [2022-01-31 20:01:27,684 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 20:01:27,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:01:27,685 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 243 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:27,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 123 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:01:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 20:01:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 76. [2022-01-31 20:01:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2022-01-31 20:01:27,707 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 50 [2022-01-31 20:01:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:27,707 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2022-01-31 20:01:27,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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 20:01:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2022-01-31 20:01:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:01:27,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:27,708 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:27,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:01:27,709 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1149798819, now seen corresponding path program 8 times [2022-01-31 20:01:27,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:27,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054344003] [2022-01-31 20:01:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:27,711 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:27,712 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:27,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:27,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:27,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:27,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:27,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054344003] [2022-01-31 20:01:27,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1054344003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:27,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:27,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:01:27,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184772467] [2022-01-31 20:01:27,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:27,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:01:27,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:01:27,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:01:27,905 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 11 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 20:01:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:28,165 INFO L93 Difference]: Finished difference Result 158 states and 222 transitions. [2022-01-31 20:01:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:01:28,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 11 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) Word has length 55 [2022-01-31 20:01:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:28,167 INFO L225 Difference]: With dead ends: 158 [2022-01-31 20:01:28,167 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 20:01:28,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:01:28,168 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 404 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:28,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 126 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:28,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 20:01:28,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 83. [2022-01-31 20:01:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 77 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2022-01-31 20:01:28,195 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 55 [2022-01-31 20:01:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:28,195 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2022-01-31 20:01:28,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 11 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 20:01:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2022-01-31 20:01:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:01:28,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:28,196 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:28,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:01:28,197 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:28,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:28,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1040253476, now seen corresponding path program 9 times [2022-01-31 20:01:28,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:28,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591173515] [2022-01-31 20:01:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:28,200 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:28,200 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:28,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:28,202 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:28,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:28,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:28,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591173515] [2022-01-31 20:01:28,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [591173515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:28,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:28,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:01:28,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979934789] [2022-01-31 20:01:28,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:28,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:01:28,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:28,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:01:28,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:01:28,385 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 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 20:01:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:28,670 INFO L93 Difference]: Finished difference Result 171 states and 241 transitions. [2022-01-31 20:01:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:01:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 20:01:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:28,672 INFO L225 Difference]: With dead ends: 171 [2022-01-31 20:01:28,672 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 20:01:28,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:01:28,673 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 291 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:28,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 147 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 20:01:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2022-01-31 20:01:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.4047619047619047) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 123 transitions. [2022-01-31 20:01:28,704 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 123 transitions. Word has length 60 [2022-01-31 20:01:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:28,705 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 123 transitions. [2022-01-31 20:01:28,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 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 20:01:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 123 transitions. [2022-01-31 20:01:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 20:01:28,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:28,706 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:28,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:01:28,706 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:28,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:28,706 INFO L85 PathProgramCache]: Analyzing trace with hash 288666179, now seen corresponding path program 10 times [2022-01-31 20:01:28,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:28,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388409627] [2022-01-31 20:01:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:28,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:28,709 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:28,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:28,711 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:28,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:28,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388409627] [2022-01-31 20:01:28,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388409627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:28,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:01:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580983616] [2022-01-31 20:01:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:01:28,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:01:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:01:28,911 INFO L87 Difference]: Start difference. First operand 90 states and 123 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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 20:01:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:29,196 INFO L93 Difference]: Finished difference Result 184 states and 260 transitions. [2022-01-31 20:01:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:01:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) Word has length 65 [2022-01-31 20:01:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:29,198 INFO L225 Difference]: With dead ends: 184 [2022-01-31 20:01:29,198 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 20:01:29,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:01:29,199 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 370 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:29,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 152 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 20:01:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 97. [2022-01-31 20:01:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 91 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2022-01-31 20:01:29,232 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 65 [2022-01-31 20:01:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:29,232 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2022-01-31 20:01:29,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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 20:01:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2022-01-31 20:01:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 20:01:29,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:29,233 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:29,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:01:29,233 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:29,234 INFO L85 PathProgramCache]: Analyzing trace with hash -810205820, now seen corresponding path program 11 times [2022-01-31 20:01:29,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:29,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89721597] [2022-01-31 20:01:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:29,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:29,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:29,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:29,239 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:29,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:29,481 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:29,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89721597] [2022-01-31 20:01:29,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [89721597] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:29,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:29,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:01:29,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135834926] [2022-01-31 20:01:29,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:29,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:01:29,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:29,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:01:29,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:01:29,483 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 16 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 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 20:01:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:29,805 INFO L93 Difference]: Finished difference Result 197 states and 279 transitions. [2022-01-31 20:01:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:01:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 20:01:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:29,806 INFO L225 Difference]: With dead ends: 197 [2022-01-31 20:01:29,806 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 20:01:29,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:01:29,810 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 369 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:29,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 164 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 20:01:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 104. [2022-01-31 20:01:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.4081632653061225) internal successors, (138), 98 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 143 transitions. [2022-01-31 20:01:29,839 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 143 transitions. Word has length 70 [2022-01-31 20:01:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:29,840 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 143 transitions. [2022-01-31 20:01:29,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 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 20:01:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 143 transitions. [2022-01-31 20:01:29,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 20:01:29,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:29,841 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:29,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:01:29,841 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:29,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1044475165, now seen corresponding path program 12 times [2022-01-31 20:01:29,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:29,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330346979] [2022-01-31 20:01:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:29,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:29,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:29,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:29,847 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:30,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:30,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330346979] [2022-01-31 20:01:30,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [330346979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:30,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:30,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:01:30,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106579954] [2022-01-31 20:01:30,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:30,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:01:30,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:01:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:01:30,087 INFO L87 Difference]: Start difference. First operand 104 states and 143 transitions. Second operand has 17 states, 16 states have (on average 4.4375) internal successors, (71), 15 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 20:01:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:30,433 INFO L93 Difference]: Finished difference Result 210 states and 298 transitions. [2022-01-31 20:01:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:01:30,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.4375) internal successors, (71), 15 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) Word has length 75 [2022-01-31 20:01:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:30,435 INFO L225 Difference]: With dead ends: 210 [2022-01-31 20:01:30,435 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 20:01:30,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:01:30,436 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 354 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:30,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 176 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 20:01:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 111. [2022-01-31 20:01:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 105 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2022-01-31 20:01:30,468 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 75 [2022-01-31 20:01:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:30,468 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2022-01-31 20:01:30,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.4375) internal successors, (71), 15 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 20:01:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2022-01-31 20:01:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 20:01:30,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:30,473 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:30,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:01:30,473 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:30,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1532936420, now seen corresponding path program 13 times [2022-01-31 20:01:30,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:30,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922619561] [2022-01-31 20:01:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:30,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:30,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:30,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:30,479 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:30,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:30,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:30,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922619561] [2022-01-31 20:01:30,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1922619561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:30,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:30,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:01:30,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735422490] [2022-01-31 20:01:30,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:30,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:01:30,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:01:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:01:30,751 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 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 20:01:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:31,107 INFO L93 Difference]: Finished difference Result 223 states and 317 transitions. [2022-01-31 20:01:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:01:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 20:01:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:31,109 INFO L225 Difference]: With dead ends: 223 [2022-01-31 20:01:31,109 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 20:01:31,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=219, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:01:31,110 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 412 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:31,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 192 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 20:01:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 118. [2022-01-31 20:01:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.4107142857142858) internal successors, (158), 112 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2022-01-31 20:01:31,145 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 80 [2022-01-31 20:01:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:31,145 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2022-01-31 20:01:31,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 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 20:01:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2022-01-31 20:01:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 20:01:31,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:31,146 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:31,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:01:31,147 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:31,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1180707715, now seen corresponding path program 14 times [2022-01-31 20:01:31,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:31,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818422819] [2022-01-31 20:01:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:31,149 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:31,149 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:31,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:31,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:31,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:31,409 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:31,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818422819] [2022-01-31 20:01:31,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1818422819] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:31,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:31,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:01:31,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384576406] [2022-01-31 20:01:31,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:31,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:01:31,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:01:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:01:31,411 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand has 19 states, 18 states have (on average 4.5) internal successors, (81), 17 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 20:01:31,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:31,837 INFO L93 Difference]: Finished difference Result 236 states and 336 transitions. [2022-01-31 20:01:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:01:31,838 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.5) internal successors, (81), 17 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) Word has length 85 [2022-01-31 20:01:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:31,840 INFO L225 Difference]: With dead ends: 236 [2022-01-31 20:01:31,841 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 20:01:31,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=241, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:01:31,843 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 452 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:31,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 209 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 20:01:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 125. [2022-01-31 20:01:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 119 states have (on average 1.411764705882353) internal successors, (168), 119 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 173 transitions. [2022-01-31 20:01:31,887 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 173 transitions. Word has length 85 [2022-01-31 20:01:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:31,887 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 173 transitions. [2022-01-31 20:01:31,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.5) internal successors, (81), 17 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 20:01:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 173 transitions. [2022-01-31 20:01:31,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 20:01:31,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:31,888 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:31,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:01:31,889 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash 84118596, now seen corresponding path program 15 times [2022-01-31 20:01:31,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:31,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074366610] [2022-01-31 20:01:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:31,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:31,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:31,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:31,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:32,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:32,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:32,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074366610] [2022-01-31 20:01:32,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1074366610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:32,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:32,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:01:32,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874815458] [2022-01-31 20:01:32,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:32,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:01:32,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:01:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:01:32,190 INFO L87 Difference]: Start difference. First operand 125 states and 173 transitions. Second operand has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 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 20:01:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:32,594 INFO L93 Difference]: Finished difference Result 249 states and 355 transitions. [2022-01-31 20:01:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 20:01:32,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 20:01:32,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:32,596 INFO L225 Difference]: With dead ends: 249 [2022-01-31 20:01:32,596 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 20:01:32,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:01:32,597 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 616 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:32,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 210 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:32,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 20:01:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 132. [2022-01-31 20:01:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.4126984126984128) internal successors, (178), 126 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 183 transitions. [2022-01-31 20:01:32,629 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 183 transitions. Word has length 90 [2022-01-31 20:01:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:32,630 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 183 transitions. [2022-01-31 20:01:32,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 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 20:01:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 183 transitions. [2022-01-31 20:01:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 20:01:32,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:32,631 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:32,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:01:32,631 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:32,631 INFO L85 PathProgramCache]: Analyzing trace with hash 248740899, now seen corresponding path program 16 times [2022-01-31 20:01:32,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:32,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313643201] [2022-01-31 20:01:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:32,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:32,634 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:32,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:32,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:32,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:32,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:32,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313643201] [2022-01-31 20:01:32,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313643201] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:32,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:32,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:01:32,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814936708] [2022-01-31 20:01:32,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:32,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:01:32,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:32,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:01:32,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:01:32,943 INFO L87 Difference]: Start difference. First operand 132 states and 183 transitions. Second operand has 21 states, 20 states have (on average 4.55) internal successors, (91), 19 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 20:01:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:33,387 INFO L93 Difference]: Finished difference Result 262 states and 374 transitions. [2022-01-31 20:01:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:01:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.55) internal successors, (91), 19 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) Word has length 95 [2022-01-31 20:01:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:33,389 INFO L225 Difference]: With dead ends: 262 [2022-01-31 20:01:33,389 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 20:01:33,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=288, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:01:33,390 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 487 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:33,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 226 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 20:01:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 139. [2022-01-31 20:01:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 133 states have (on average 1.413533834586466) internal successors, (188), 133 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2022-01-31 20:01:33,426 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 95 [2022-01-31 20:01:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:33,427 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2022-01-31 20:01:33,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.55) internal successors, (91), 19 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 20:01:33,427 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2022-01-31 20:01:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 20:01:33,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:33,428 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:33,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:01:33,428 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:33,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash 556375972, now seen corresponding path program 17 times [2022-01-31 20:01:33,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:33,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846579696] [2022-01-31 20:01:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:33,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:33,431 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:33,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:33,433 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:33,757 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:33,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846579696] [2022-01-31 20:01:33,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [846579696] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:33,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:33,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:01:33,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833369700] [2022-01-31 20:01:33,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:33,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:01:33,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:33,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:01:33,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:01:33,759 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand has 22 states, 21 states have (on average 4.571428571428571) internal successors, (96), 20 states have internal predecessors, (96), 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 20:01:34,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:34,232 INFO L93 Difference]: Finished difference Result 275 states and 393 transitions. [2022-01-31 20:01:34,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 20:01:34,233 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.571428571428571) internal successors, (96), 20 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 20:01:34,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:34,238 INFO L225 Difference]: With dead ends: 275 [2022-01-31 20:01:34,238 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 20:01:34,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=313, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:01:34,239 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 516 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:34,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 243 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 20:01:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 146. [2022-01-31 20:01:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.4142857142857144) internal successors, (198), 140 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 203 transitions. [2022-01-31 20:01:34,278 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 203 transitions. Word has length 100 [2022-01-31 20:01:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:34,278 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 203 transitions. [2022-01-31 20:01:34,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.571428571428571) internal successors, (96), 20 states have internal predecessors, (96), 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 20:01:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 203 transitions. [2022-01-31 20:01:34,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 20:01:34,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:34,280 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:34,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:01:34,280 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1437432637, now seen corresponding path program 18 times [2022-01-31 20:01:34,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:34,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65626571] [2022-01-31 20:01:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:34,282 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:34,282 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:34,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:34,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:34,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:34,613 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:34,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65626571] [2022-01-31 20:01:34,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [65626571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:34,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:34,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:01:34,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508053196] [2022-01-31 20:01:34,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:34,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:01:34,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:34,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:01:34,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:01:34,615 INFO L87 Difference]: Start difference. First operand 146 states and 203 transitions. Second operand has 23 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 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 20:01:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:35,125 INFO L93 Difference]: Finished difference Result 288 states and 412 transitions. [2022-01-31 20:01:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:01:35,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 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) Word has length 105 [2022-01-31 20:01:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:35,128 INFO L225 Difference]: With dead ends: 288 [2022-01-31 20:01:35,128 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 20:01:35,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=339, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:01:35,129 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 665 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:35,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 245 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 20:01:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 153. [2022-01-31 20:01:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.4149659863945578) internal successors, (208), 147 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 213 transitions. [2022-01-31 20:01:35,177 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 213 transitions. Word has length 105 [2022-01-31 20:01:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:35,177 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 213 transitions. [2022-01-31 20:01:35,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.590909090909091) internal successors, (101), 21 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 20:01:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 213 transitions. [2022-01-31 20:01:35,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 20:01:35,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:35,179 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:35,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:01:35,179 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:35,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1797850364, now seen corresponding path program 19 times [2022-01-31 20:01:35,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:35,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012292245] [2022-01-31 20:01:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:35,182 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:35,182 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:35,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:35,184 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:35,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:35,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012292245] [2022-01-31 20:01:35,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012292245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:35,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:35,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:01:35,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474055489] [2022-01-31 20:01:35,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:35,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:01:35,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:01:35,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:01:35,571 INFO L87 Difference]: Start difference. First operand 153 states and 213 transitions. Second operand has 24 states, 23 states have (on average 4.608695652173913) internal successors, (106), 22 states have internal predecessors, (106), 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 20:01:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:36,056 INFO L93 Difference]: Finished difference Result 301 states and 431 transitions. [2022-01-31 20:01:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 20:01:36,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.608695652173913) internal successors, (106), 22 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 20:01:36,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:36,057 INFO L225 Difference]: With dead ends: 301 [2022-01-31 20:01:36,058 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 20:01:36,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=284, Invalid=366, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:01:36,058 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 783 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:36,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 257 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:01:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 20:01:36,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 160. [2022-01-31 20:01:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.4155844155844155) internal successors, (218), 154 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 223 transitions. [2022-01-31 20:01:36,103 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 223 transitions. Word has length 110 [2022-01-31 20:01:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:36,103 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 223 transitions. [2022-01-31 20:01:36,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.608695652173913) internal successors, (106), 22 states have internal predecessors, (106), 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 20:01:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 223 transitions. [2022-01-31 20:01:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 20:01:36,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:36,104 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:36,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:01:36,104 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:36,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:36,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1737966947, now seen corresponding path program 20 times [2022-01-31 20:01:36,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:36,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753237286] [2022-01-31 20:01:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:36,107 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:36,107 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:36,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:36,109 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:36,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:36,521 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 20:01:36,521 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:36,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753237286] [2022-01-31 20:01:36,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [753237286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:36,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:36,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:01:36,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374116884] [2022-01-31 20:01:36,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:36,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:01:36,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:01:36,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:01:36,523 INFO L87 Difference]: Start difference. First operand 160 states and 223 transitions. Second operand has 25 states, 24 states have (on average 4.625) internal successors, (111), 23 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 20:01:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:37,129 INFO L93 Difference]: Finished difference Result 314 states and 450 transitions. [2022-01-31 20:01:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 20:01:37,130 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 23 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) Word has length 115 [2022-01-31 20:01:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:37,131 INFO L225 Difference]: With dead ends: 314 [2022-01-31 20:01:37,131 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 20:01:37,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=394, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:01:37,132 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 764 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:37,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 272 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 20:01:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 167. [2022-01-31 20:01:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 161 states have (on average 1.4161490683229814) internal successors, (228), 161 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 233 transitions. [2022-01-31 20:01:37,182 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 233 transitions. Word has length 115 [2022-01-31 20:01:37,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:37,182 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 233 transitions. [2022-01-31 20:01:37,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 23 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 20:01:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 233 transitions. [2022-01-31 20:01:37,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 20:01:37,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:37,196 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:37,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:01:37,196 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash 898735716, now seen corresponding path program 21 times [2022-01-31 20:01:37,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:37,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330564411] [2022-01-31 20:01:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:37,199 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:37,199 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:37,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:37,201 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:37,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:37,579 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:37,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330564411] [2022-01-31 20:01:37,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [330564411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:37,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:37,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:01:37,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324037906] [2022-01-31 20:01:37,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:37,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:01:37,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:37,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:01:37,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:01:37,581 INFO L87 Difference]: Start difference. First operand 167 states and 233 transitions. Second operand has 26 states, 25 states have (on average 4.64) internal successors, (116), 24 states have internal predecessors, (116), 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 20:01:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:38,225 INFO L93 Difference]: Finished difference Result 327 states and 469 transitions. [2022-01-31 20:01:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 20:01:38,225 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.64) internal successors, (116), 24 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 20:01:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:38,227 INFO L225 Difference]: With dead ends: 327 [2022-01-31 20:01:38,227 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 20:01:38,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=423, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:01:38,229 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 900 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:38,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 282 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 20:01:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 174. [2022-01-31 20:01:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 168 states have (on average 1.4166666666666667) internal successors, (238), 168 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 243 transitions. [2022-01-31 20:01:38,297 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 243 transitions. Word has length 120 [2022-01-31 20:01:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:38,297 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 243 transitions. [2022-01-31 20:01:38,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.64) internal successors, (116), 24 states have internal predecessors, (116), 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 20:01:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 243 transitions. [2022-01-31 20:01:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 20:01:38,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:38,299 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:38,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:01:38,299 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:38,300 INFO L85 PathProgramCache]: Analyzing trace with hash -186925565, now seen corresponding path program 22 times [2022-01-31 20:01:38,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:38,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875554677] [2022-01-31 20:01:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:38,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:38,302 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:38,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:38,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:38,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:38,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875554677] [2022-01-31 20:01:38,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875554677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:38,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:38,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:01:38,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528038880] [2022-01-31 20:01:38,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:38,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:01:38,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:01:38,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:01:38,708 INFO L87 Difference]: Start difference. First operand 174 states and 243 transitions. Second operand has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 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 20:01:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:39,295 INFO L93 Difference]: Finished difference Result 340 states and 488 transitions. [2022-01-31 20:01:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:01:39,295 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 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) Word has length 125 [2022-01-31 20:01:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:39,296 INFO L225 Difference]: With dead ends: 340 [2022-01-31 20:01:39,297 INFO L226 Difference]: Without dead ends: 327 [2022-01-31 20:01:39,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=453, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:01:39,298 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 824 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:39,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 290 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-31 20:01:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 181. [2022-01-31 20:01:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.417142857142857) internal successors, (248), 175 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 253 transitions. [2022-01-31 20:01:39,356 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 253 transitions. Word has length 125 [2022-01-31 20:01:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:39,357 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 253 transitions. [2022-01-31 20:01:39,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 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 20:01:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 253 transitions. [2022-01-31 20:01:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 20:01:39,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:39,358 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:39,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:01:39,358 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:39,358 INFO L85 PathProgramCache]: Analyzing trace with hash 694127044, now seen corresponding path program 23 times [2022-01-31 20:01:39,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:39,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836439057] [2022-01-31 20:01:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:39,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:39,360 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:39,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:39,362 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:39,813 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:39,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836439057] [2022-01-31 20:01:39,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [836439057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:39,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:39,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:01:39,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208753741] [2022-01-31 20:01:39,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:39,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:01:39,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:39,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:01:39,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:01:39,817 INFO L87 Difference]: Start difference. First operand 181 states and 253 transitions. Second operand has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 states have internal predecessors, (126), 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 20:01:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:40,467 INFO L93 Difference]: Finished difference Result 353 states and 507 transitions. [2022-01-31 20:01:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 20:01:40,468 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-01-31 20:01:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:40,469 INFO L225 Difference]: With dead ends: 353 [2022-01-31 20:01:40,469 INFO L226 Difference]: Without dead ends: 340 [2022-01-31 20:01:40,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=386, Invalid=484, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:01:40,470 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 918 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:40,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 310 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-31 20:01:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 188. [2022-01-31 20:01:40,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.4175824175824177) internal successors, (258), 182 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:40,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 263 transitions. [2022-01-31 20:01:40,531 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 263 transitions. Word has length 130 [2022-01-31 20:01:40,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:40,531 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 263 transitions. [2022-01-31 20:01:40,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.666666666666667) internal successors, (126), 26 states have internal predecessors, (126), 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 20:01:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 263 transitions. [2022-01-31 20:01:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 20:01:40,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:40,532 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:40,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:01:40,532 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2494813, now seen corresponding path program 24 times [2022-01-31 20:01:40,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:40,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967531449] [2022-01-31 20:01:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:40,535 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:40,535 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:40,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:40,537 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:41,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:41,017 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:41,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967531449] [2022-01-31 20:01:41,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1967531449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:41,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:41,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:01:41,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838707505] [2022-01-31 20:01:41,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:41,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:01:41,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:41,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:01:41,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:01:41,018 INFO L87 Difference]: Start difference. First operand 188 states and 263 transitions. Second operand has 29 states, 28 states have (on average 4.678571428571429) internal successors, (131), 27 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 20:01:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:41,702 INFO L93 Difference]: Finished difference Result 366 states and 526 transitions. [2022-01-31 20:01:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 20:01:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.678571428571429) internal successors, (131), 27 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) Word has length 135 [2022-01-31 20:01:41,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:41,704 INFO L225 Difference]: With dead ends: 366 [2022-01-31 20:01:41,704 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 20:01:41,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=516, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:01:41,706 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1017 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:41,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 320 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:41,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 20:01:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 195. [2022-01-31 20:01:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.417989417989418) internal successors, (268), 189 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 273 transitions. [2022-01-31 20:01:41,769 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 273 transitions. Word has length 135 [2022-01-31 20:01:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:41,769 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 273 transitions. [2022-01-31 20:01:41,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.678571428571429) internal successors, (131), 27 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 20:01:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 273 transitions. [2022-01-31 20:01:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 20:01:41,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:41,770 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:41,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:01:41,771 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:41,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1187429668, now seen corresponding path program 25 times [2022-01-31 20:01:41,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:41,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033098658] [2022-01-31 20:01:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:41,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:41,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:41,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:41,776 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:42,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:42,325 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:42,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033098658] [2022-01-31 20:01:42,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1033098658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:42,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:42,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:01:42,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113273393] [2022-01-31 20:01:42,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:42,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:01:42,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:42,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:01:42,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:01:42,327 INFO L87 Difference]: Start difference. First operand 195 states and 273 transitions. Second operand has 30 states, 29 states have (on average 4.689655172413793) internal successors, (136), 28 states have internal predecessors, (136), 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 20:01:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:43,093 INFO L93 Difference]: Finished difference Result 379 states and 545 transitions. [2022-01-31 20:01:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:01:43,094 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.689655172413793) internal successors, (136), 28 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 20:01:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:43,096 INFO L225 Difference]: With dead ends: 379 [2022-01-31 20:01:43,096 INFO L226 Difference]: Without dead ends: 366 [2022-01-31 20:01:43,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=443, Invalid=549, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:01:43,101 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 873 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:43,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 332 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:43,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-31 20:01:43,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 202. [2022-01-31 20:01:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.4183673469387754) internal successors, (278), 196 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 283 transitions. [2022-01-31 20:01:43,182 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 283 transitions. Word has length 140 [2022-01-31 20:01:43,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:43,183 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 283 transitions. [2022-01-31 20:01:43,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.689655172413793) internal successors, (136), 28 states have internal predecessors, (136), 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 20:01:43,183 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 283 transitions. [2022-01-31 20:01:43,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 20:01:43,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:43,184 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:43,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:01:43,184 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:43,185 INFO L85 PathProgramCache]: Analyzing trace with hash -708061373, now seen corresponding path program 26 times [2022-01-31 20:01:43,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:43,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435207622] [2022-01-31 20:01:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:43,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:43,187 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:43,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:43,190 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:43,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:43,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:43,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435207622] [2022-01-31 20:01:43,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [435207622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:43,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:43,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:01:43,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468280437] [2022-01-31 20:01:43,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:43,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:01:43,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:43,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:01:43,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:01:43,753 INFO L87 Difference]: Start difference. First operand 202 states and 283 transitions. Second operand has 31 states, 30 states have (on average 4.7) internal successors, (141), 29 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 20:01:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:44,709 INFO L93 Difference]: Finished difference Result 392 states and 564 transitions. [2022-01-31 20:01:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:01:44,710 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.7) internal successors, (141), 29 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) Word has length 145 [2022-01-31 20:01:44,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:44,711 INFO L225 Difference]: With dead ends: 392 [2022-01-31 20:01:44,711 INFO L226 Difference]: Without dead ends: 379 [2022-01-31 20:01:44,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=473, Invalid=583, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:01:44,712 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 882 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:44,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 339 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-31 20:01:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 209. [2022-01-31 20:01:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 203 states have (on average 1.4187192118226601) internal successors, (288), 203 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 293 transitions. [2022-01-31 20:01:44,807 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 293 transitions. Word has length 145 [2022-01-31 20:01:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:44,808 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 293 transitions. [2022-01-31 20:01:44,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.7) internal successors, (141), 29 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 20:01:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 293 transitions. [2022-01-31 20:01:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 20:01:44,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:44,809 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:44,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:01:44,809 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1959606404, now seen corresponding path program 27 times [2022-01-31 20:01:44,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:44,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343131011] [2022-01-31 20:01:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:44,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:44,812 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:44,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:44,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:45,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:45,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:45,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343131011] [2022-01-31 20:01:45,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1343131011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:45,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:45,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:01:45,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014341933] [2022-01-31 20:01:45,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:45,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:01:45,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:45,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:01:45,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:01:45,395 INFO L87 Difference]: Start difference. First operand 209 states and 293 transitions. Second operand has 32 states, 31 states have (on average 4.709677419354839) internal successors, (146), 30 states have internal predecessors, (146), 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 20:01:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:46,320 INFO L93 Difference]: Finished difference Result 405 states and 583 transitions. [2022-01-31 20:01:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 20:01:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.709677419354839) internal successors, (146), 30 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 20:01:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:46,323 INFO L225 Difference]: With dead ends: 405 [2022-01-31 20:01:46,323 INFO L226 Difference]: Without dead ends: 392 [2022-01-31 20:01:46,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=504, Invalid=618, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:01:46,324 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1170 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:46,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1199 Valid, 350 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-31 20:01:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 216. [2022-01-31 20:01:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.4190476190476191) internal successors, (298), 210 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 303 transitions. [2022-01-31 20:01:46,425 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 303 transitions. Word has length 150 [2022-01-31 20:01:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:46,426 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 303 transitions. [2022-01-31 20:01:46,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.709677419354839) internal successors, (146), 30 states have internal predecessors, (146), 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 20:01:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 303 transitions. [2022-01-31 20:01:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 20:01:46,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:46,427 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:46,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:01:46,428 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash 57374691, now seen corresponding path program 28 times [2022-01-31 20:01:46,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423982935] [2022-01-31 20:01:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:46,434 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:46,434 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:46,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:46,438 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:47,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:47,090 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:47,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423982935] [2022-01-31 20:01:47,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [423982935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:47,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:47,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:01:47,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323168313] [2022-01-31 20:01:47,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:47,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:01:47,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:01:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:01:47,092 INFO L87 Difference]: Start difference. First operand 216 states and 303 transitions. Second operand has 33 states, 32 states have (on average 4.71875) internal successors, (151), 31 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 20:01:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:48,278 INFO L93 Difference]: Finished difference Result 418 states and 602 transitions. [2022-01-31 20:01:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 20:01:48,278 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.71875) internal successors, (151), 31 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) Word has length 155 [2022-01-31 20:01:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:48,280 INFO L225 Difference]: With dead ends: 418 [2022-01-31 20:01:48,280 INFO L226 Difference]: Without dead ends: 405 [2022-01-31 20:01:48,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=654, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:01:48,281 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1338 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:48,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1368 Valid, 370 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:01:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-31 20:01:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 223. [2022-01-31 20:01:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.4193548387096775) internal successors, (308), 217 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 313 transitions. [2022-01-31 20:01:48,391 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 313 transitions. Word has length 155 [2022-01-31 20:01:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:48,392 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 313 transitions. [2022-01-31 20:01:48,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.71875) internal successors, (151), 31 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 20:01:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 313 transitions. [2022-01-31 20:01:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 20:01:48,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:48,393 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:48,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:01:48,393 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:48,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:48,394 INFO L85 PathProgramCache]: Analyzing trace with hash 184089572, now seen corresponding path program 29 times [2022-01-31 20:01:48,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:48,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118945509] [2022-01-31 20:01:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:48,397 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:48,397 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:48,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:48,400 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:49,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:49,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:49,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118945509] [2022-01-31 20:01:49,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [118945509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:49,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:49,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:01:49,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077210] [2022-01-31 20:01:49,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:49,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:01:49,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:49,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:01:49,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:01:49,066 INFO L87 Difference]: Start difference. First operand 223 states and 313 transitions. Second operand has 34 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 32 states have internal predecessors, (156), 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 20:01:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:50,194 INFO L93 Difference]: Finished difference Result 431 states and 621 transitions. [2022-01-31 20:01:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:01:50,194 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 32 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-01-31 20:01:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:50,196 INFO L225 Difference]: With dead ends: 431 [2022-01-31 20:01:50,196 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 20:01:50,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=569, Invalid=691, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:01:50,197 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 908 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:50,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 376 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 20:01:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 230. [2022-01-31 20:01:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 224 states have (on average 1.4196428571428572) internal successors, (318), 224 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 323 transitions. [2022-01-31 20:01:50,290 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 323 transitions. Word has length 160 [2022-01-31 20:01:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:50,290 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 323 transitions. [2022-01-31 20:01:50,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 32 states have internal predecessors, (156), 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 20:01:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 323 transitions. [2022-01-31 20:01:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 20:01:50,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:50,291 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:50,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:01:50,292 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash -185413501, now seen corresponding path program 30 times [2022-01-31 20:01:50,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:50,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045797887] [2022-01-31 20:01:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:50,295 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:50,295 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:50,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:50,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:50,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:50,985 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:50,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045797887] [2022-01-31 20:01:50,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1045797887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:50,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:50,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:01:50,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786326768] [2022-01-31 20:01:50,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:50,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 20:01:50,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:50,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 20:01:50,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:01:50,987 INFO L87 Difference]: Start difference. First operand 230 states and 323 transitions. Second operand has 35 states, 34 states have (on average 4.735294117647059) internal successors, (161), 33 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 20:01:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:52,130 INFO L93 Difference]: Finished difference Result 444 states and 640 transitions. [2022-01-31 20:01:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:01:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.735294117647059) internal successors, (161), 33 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) Word has length 165 [2022-01-31 20:01:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:52,132 INFO L225 Difference]: With dead ends: 444 [2022-01-31 20:01:52,132 INFO L226 Difference]: Without dead ends: 431 [2022-01-31 20:01:52,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=603, Invalid=729, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:01:52,133 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1141 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:52,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 397 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:01:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-31 20:01:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 237. [2022-01-31 20:01:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 231 states have (on average 1.41991341991342) internal successors, (328), 231 states have internal predecessors, (328), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 333 transitions. [2022-01-31 20:01:52,245 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 333 transitions. Word has length 165 [2022-01-31 20:01:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:52,246 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 333 transitions. [2022-01-31 20:01:52,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.735294117647059) internal successors, (161), 33 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 20:01:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 333 transitions. [2022-01-31 20:01:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 20:01:52,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:52,247 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:52,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:01:52,247 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:52,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:52,247 INFO L85 PathProgramCache]: Analyzing trace with hash 827328324, now seen corresponding path program 31 times [2022-01-31 20:01:52,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:52,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785207258] [2022-01-31 20:01:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:52,250 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:52,250 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:52,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:52,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:52,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:52,950 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:52,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785207258] [2022-01-31 20:01:52,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785207258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:52,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:52,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 20:01:52,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342579663] [2022-01-31 20:01:52,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:52,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 20:01:52,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:52,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 20:01:52,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:01:52,952 INFO L87 Difference]: Start difference. First operand 237 states and 333 transitions. Second operand has 36 states, 35 states have (on average 4.742857142857143) internal successors, (166), 34 states have internal predecessors, (166), 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 20:01:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:54,113 INFO L93 Difference]: Finished difference Result 457 states and 659 transitions. [2022-01-31 20:01:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 20:01:54,114 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.742857142857143) internal successors, (166), 34 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-01-31 20:01:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:54,115 INFO L225 Difference]: With dead ends: 457 [2022-01-31 20:01:54,115 INFO L226 Difference]: Without dead ends: 444 [2022-01-31 20:01:54,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=638, Invalid=768, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:01:54,116 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1118 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:54,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 406 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-31 20:01:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 244. [2022-01-31 20:01:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.4201680672268908) internal successors, (338), 238 states have internal predecessors, (338), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 343 transitions. [2022-01-31 20:01:54,230 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 343 transitions. Word has length 170 [2022-01-31 20:01:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:54,230 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 343 transitions. [2022-01-31 20:01:54,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.742857142857143) internal successors, (166), 34 states have internal predecessors, (166), 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 20:01:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 343 transitions. [2022-01-31 20:01:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 20:01:54,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:54,231 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:54,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 20:01:54,232 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:54,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1776557789, now seen corresponding path program 32 times [2022-01-31 20:01:54,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:54,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104491391] [2022-01-31 20:01:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:54,235 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:54,235 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:54,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:54,238 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:54,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:54,930 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:54,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104491391] [2022-01-31 20:01:54,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104491391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:54,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:54,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 20:01:54,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139524938] [2022-01-31 20:01:54,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:54,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 20:01:54,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:54,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 20:01:54,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:01:54,933 INFO L87 Difference]: Start difference. First operand 244 states and 343 transitions. Second operand has 37 states, 36 states have (on average 4.75) internal successors, (171), 35 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 20:01:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:56,218 INFO L93 Difference]: Finished difference Result 470 states and 678 transitions. [2022-01-31 20:01:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 20:01:56,219 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.75) internal successors, (171), 35 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) Word has length 175 [2022-01-31 20:01:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:56,221 INFO L225 Difference]: With dead ends: 470 [2022-01-31 20:01:56,221 INFO L226 Difference]: Without dead ends: 457 [2022-01-31 20:01:56,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=674, Invalid=808, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:01:56,222 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1154 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:56,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 419 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:01:56,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-31 20:01:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 251. [2022-01-31 20:01:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.420408163265306) internal successors, (348), 245 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 353 transitions. [2022-01-31 20:01:56,354 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 353 transitions. Word has length 175 [2022-01-31 20:01:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:56,354 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 353 transitions. [2022-01-31 20:01:56,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.75) internal successors, (171), 35 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 20:01:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 353 transitions. [2022-01-31 20:01:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 20:01:56,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:56,356 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:56,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 20:01:56,356 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1079532196, now seen corresponding path program 33 times [2022-01-31 20:01:56,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:56,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917818285] [2022-01-31 20:01:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:56,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:56,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:56,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:56,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:57,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:57,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:57,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917818285] [2022-01-31 20:01:57,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1917818285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:57,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:57,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 20:01:57,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705909806] [2022-01-31 20:01:57,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:57,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 20:01:57,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:57,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 20:01:57,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:01:57,086 INFO L87 Difference]: Start difference. First operand 251 states and 353 transitions. Second operand has 38 states, 37 states have (on average 4.756756756756757) internal successors, (176), 36 states have internal predecessors, (176), 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 20:01:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:58,430 INFO L93 Difference]: Finished difference Result 483 states and 697 transitions. [2022-01-31 20:01:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 20:01:58,430 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.756756756756757) internal successors, (176), 36 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-01-31 20:01:58,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:58,432 INFO L225 Difference]: With dead ends: 483 [2022-01-31 20:01:58,432 INFO L226 Difference]: Without dead ends: 470 [2022-01-31 20:01:58,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=711, Invalid=849, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:01:58,433 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1065 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:58,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 445 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:01:58,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-31 20:01:58,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 258. [2022-01-31 20:01:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 252 states have (on average 1.4206349206349207) internal successors, (358), 252 states have internal predecessors, (358), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:01:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 363 transitions. [2022-01-31 20:01:58,584 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 363 transitions. Word has length 180 [2022-01-31 20:01:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:58,584 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 363 transitions. [2022-01-31 20:01:58,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.756756756756757) internal successors, (176), 36 states have internal predecessors, (176), 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 20:01:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 363 transitions. [2022-01-31 20:01:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 20:01:58,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:58,586 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:58,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 20:01:58,586 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:58,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:58,586 INFO L85 PathProgramCache]: Analyzing trace with hash -232740413, now seen corresponding path program 34 times [2022-01-31 20:01:58,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:58,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635504072] [2022-01-31 20:01:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:58,589 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:58,589 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:58,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:58,593 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:59,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:59,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635504072] [2022-01-31 20:01:59,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [635504072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:59,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:59,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 20:01:59,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286421819] [2022-01-31 20:01:59,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:59,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 20:01:59,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:59,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 20:01:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:01:59,357 INFO L87 Difference]: Start difference. First operand 258 states and 363 transitions. Second operand has 39 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 37 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 20:02:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:00,816 INFO L93 Difference]: Finished difference Result 496 states and 716 transitions. [2022-01-31 20:02:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 20:02:00,817 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 37 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) Word has length 185 [2022-01-31 20:02:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:00,818 INFO L225 Difference]: With dead ends: 496 [2022-01-31 20:02:00,819 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 20:02:00,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=749, Invalid=891, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:02:00,819 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2111 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2147 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:00,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2147 Valid, 431 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:02:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 20:02:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 265. [2022-01-31 20:02:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 259 states have (on average 1.420849420849421) internal successors, (368), 259 states have internal predecessors, (368), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 373 transitions. [2022-01-31 20:02:00,936 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 373 transitions. Word has length 185 [2022-01-31 20:02:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:00,936 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 373 transitions. [2022-01-31 20:02:00,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 37 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 20:02:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 373 transitions. [2022-01-31 20:02:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 20:02:00,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:00,937 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:00,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 20:02:00,938 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:00,938 INFO L85 PathProgramCache]: Analyzing trace with hash 555218436, now seen corresponding path program 35 times [2022-01-31 20:02:00,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:00,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979439876] [2022-01-31 20:02:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:00,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:00,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:00,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:00,946 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:01,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:01,784 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979439876] [2022-01-31 20:02:01,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1979439876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:01,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:01,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 20:02:01,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616603309] [2022-01-31 20:02:01,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:01,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:02:01,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:01,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:02:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:02:01,786 INFO L87 Difference]: Start difference. First operand 265 states and 373 transitions. Second operand has 40 states, 39 states have (on average 4.769230769230769) internal successors, (186), 38 states have internal predecessors, (186), 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 20:02:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:03,310 INFO L93 Difference]: Finished difference Result 509 states and 735 transitions. [2022-01-31 20:02:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 20:02:03,311 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.769230769230769) internal successors, (186), 38 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 20:02:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:03,313 INFO L225 Difference]: With dead ends: 509 [2022-01-31 20:02:03,313 INFO L226 Difference]: Without dead ends: 496 [2022-01-31 20:02:03,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=934, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:02:03,314 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1207 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:03,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1244 Valid, 446 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:02:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-31 20:02:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 272. [2022-01-31 20:02:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.4210526315789473) internal successors, (378), 266 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 383 transitions. [2022-01-31 20:02:03,428 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 383 transitions. Word has length 190 [2022-01-31 20:02:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:03,428 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 383 transitions. [2022-01-31 20:02:03,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.769230769230769) internal successors, (186), 38 states have internal predecessors, (186), 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 20:02:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 383 transitions. [2022-01-31 20:02:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 20:02:03,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:03,429 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:03,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 20:02:03,430 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:03,430 INFO L85 PathProgramCache]: Analyzing trace with hash -742708637, now seen corresponding path program 36 times [2022-01-31 20:02:03,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:03,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636824051] [2022-01-31 20:02:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:03,432 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:03,433 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:03,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:03,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:04,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:04,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:04,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636824051] [2022-01-31 20:02:04,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1636824051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:04,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:04,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:02:04,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367367240] [2022-01-31 20:02:04,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:04,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 20:02:04,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:04,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 20:02:04,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:02:04,291 INFO L87 Difference]: Start difference. First operand 272 states and 383 transitions. Second operand has 41 states, 40 states have (on average 4.775) internal successors, (191), 39 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 20:02:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:05,928 INFO L93 Difference]: Finished difference Result 522 states and 754 transitions. [2022-01-31 20:02:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:02:05,929 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.775) internal successors, (191), 39 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) Word has length 195 [2022-01-31 20:02:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:05,931 INFO L225 Difference]: With dead ends: 522 [2022-01-31 20:02:05,931 INFO L226 Difference]: Without dead ends: 509 [2022-01-31 20:02:05,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=828, Invalid=978, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:02:05,932 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1368 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:05,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1406 Valid, 453 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:02:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-31 20:02:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 279. [2022-01-31 20:02:06,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 273 states have (on average 1.4212454212454213) internal successors, (388), 273 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 393 transitions. [2022-01-31 20:02:06,099 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 393 transitions. Word has length 195 [2022-01-31 20:02:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:06,100 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 393 transitions. [2022-01-31 20:02:06,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.775) internal successors, (191), 39 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 20:02:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 393 transitions. [2022-01-31 20:02:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 20:02:06,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:06,101 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:06,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 20:02:06,101 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:06,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:06,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1391142556, now seen corresponding path program 37 times [2022-01-31 20:02:06,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:06,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560125443] [2022-01-31 20:02:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:06,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:06,106 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:06,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:06,110 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:06,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:06,993 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:06,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560125443] [2022-01-31 20:02:06,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560125443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:06,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:06,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 20:02:06,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734626827] [2022-01-31 20:02:06,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:06,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:02:06,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:02:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:02:06,995 INFO L87 Difference]: Start difference. First operand 279 states and 393 transitions. Second operand has 42 states, 41 states have (on average 4.780487804878049) internal successors, (196), 40 states have internal predecessors, (196), 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 20:02:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:08,750 INFO L93 Difference]: Finished difference Result 535 states and 773 transitions. [2022-01-31 20:02:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 20:02:08,751 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.780487804878049) internal successors, (196), 40 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-01-31 20:02:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:08,752 INFO L225 Difference]: With dead ends: 535 [2022-01-31 20:02:08,752 INFO L226 Difference]: Without dead ends: 522 [2022-01-31 20:02:08,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=869, Invalid=1023, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:02:08,753 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1180 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:08,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 472 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:02:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-31 20:02:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 286. [2022-01-31 20:02:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.4214285714285715) internal successors, (398), 280 states have internal predecessors, (398), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 403 transitions. [2022-01-31 20:02:08,890 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 403 transitions. Word has length 200 [2022-01-31 20:02:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:08,890 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 403 transitions. [2022-01-31 20:02:08,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.780487804878049) internal successors, (196), 40 states have internal predecessors, (196), 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 20:02:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 403 transitions. [2022-01-31 20:02:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 20:02:08,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:08,892 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:08,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 20:02:08,892 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1696948995, now seen corresponding path program 38 times [2022-01-31 20:02:08,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:08,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855226844] [2022-01-31 20:02:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:08,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:08,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:08,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:08,899 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:09,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:09,829 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:09,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855226844] [2022-01-31 20:02:09,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855226844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:09,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:09,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:02:09,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278940780] [2022-01-31 20:02:09,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:09,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 20:02:09,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:09,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 20:02:09,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:02:09,831 INFO L87 Difference]: Start difference. First operand 286 states and 403 transitions. Second operand has 43 states, 42 states have (on average 4.785714285714286) internal successors, (201), 41 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 20:02:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:11,685 INFO L93 Difference]: Finished difference Result 548 states and 792 transitions. [2022-01-31 20:02:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 20:02:11,686 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.785714285714286) internal successors, (201), 41 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) Word has length 205 [2022-01-31 20:02:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:11,687 INFO L225 Difference]: With dead ends: 548 [2022-01-31 20:02:11,687 INFO L226 Difference]: Without dead ends: 535 [2022-01-31 20:02:11,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=911, Invalid=1069, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:02:11,688 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1306 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:11,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 486 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:02:11,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-31 20:02:11,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 293. [2022-01-31 20:02:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 287 states have (on average 1.421602787456446) internal successors, (408), 287 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:11,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 413 transitions. [2022-01-31 20:02:11,811 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 413 transitions. Word has length 205 [2022-01-31 20:02:11,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:11,811 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 413 transitions. [2022-01-31 20:02:11,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.785714285714286) internal successors, (201), 41 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 20:02:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 413 transitions. [2022-01-31 20:02:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 20:02:11,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:11,813 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:11,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 20:02:11,813 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:11,814 INFO L85 PathProgramCache]: Analyzing trace with hash 240452804, now seen corresponding path program 39 times [2022-01-31 20:02:11,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:11,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862514032] [2022-01-31 20:02:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:11,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:11,817 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:11,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:11,821 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:12,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:12,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:12,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862514032] [2022-01-31 20:02:12,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [862514032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:12,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:12,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 20:02:12,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543389917] [2022-01-31 20:02:12,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:12,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:02:12,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:02:12,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:02:12,829 INFO L87 Difference]: Start difference. First operand 293 states and 413 transitions. Second operand has 44 states, 43 states have (on average 4.790697674418604) internal successors, (206), 42 states have internal predecessors, (206), 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 20:02:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:14,832 INFO L93 Difference]: Finished difference Result 561 states and 811 transitions. [2022-01-31 20:02:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:02:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.790697674418604) internal successors, (206), 42 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-01-31 20:02:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:14,834 INFO L225 Difference]: With dead ends: 561 [2022-01-31 20:02:14,834 INFO L226 Difference]: Without dead ends: 548 [2022-01-31 20:02:14,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=954, Invalid=1116, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:02:14,835 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1325 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:14,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1366 Valid, 495 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:02:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-31 20:02:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 300. [2022-01-31 20:02:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.4217687074829932) internal successors, (418), 294 states have internal predecessors, (418), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 423 transitions. [2022-01-31 20:02:14,977 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 423 transitions. Word has length 210 [2022-01-31 20:02:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:14,978 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 423 transitions. [2022-01-31 20:02:14,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.790697674418604) internal successors, (206), 42 states have internal predecessors, (206), 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 20:02:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 423 transitions. [2022-01-31 20:02:14,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 20:02:14,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:14,979 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:14,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 20:02:14,980 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:14,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:14,980 INFO L85 PathProgramCache]: Analyzing trace with hash -803646557, now seen corresponding path program 40 times [2022-01-31 20:02:14,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:14,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897594341] [2022-01-31 20:02:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:14,983 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:14,983 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:14,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:14,987 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:16,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:16,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:16,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897594341] [2022-01-31 20:02:16,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897594341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:16,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:16,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:02:16,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32997709] [2022-01-31 20:02:16,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:16,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:02:16,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:16,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:02:16,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:02:16,010 INFO L87 Difference]: Start difference. First operand 300 states and 423 transitions. Second operand has 45 states, 44 states have (on average 4.795454545454546) internal successors, (211), 43 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 20:02:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:18,120 INFO L93 Difference]: Finished difference Result 574 states and 830 transitions. [2022-01-31 20:02:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 20:02:18,120 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.795454545454546) internal successors, (211), 43 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) Word has length 215 [2022-01-31 20:02:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:18,122 INFO L225 Difference]: With dead ends: 574 [2022-01-31 20:02:18,122 INFO L226 Difference]: Without dead ends: 561 [2022-01-31 20:02:18,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=998, Invalid=1164, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:02:18,123 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1293 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:18,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1335 Valid, 504 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:02:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-31 20:02:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 307. [2022-01-31 20:02:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.4219269102990033) internal successors, (428), 301 states have internal predecessors, (428), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 433 transitions. [2022-01-31 20:02:18,266 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 433 transitions. Word has length 215 [2022-01-31 20:02:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:18,267 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 433 transitions. [2022-01-31 20:02:18,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.795454545454546) internal successors, (211), 43 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 20:02:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 433 transitions. [2022-01-31 20:02:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 20:02:18,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:18,268 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:18,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 20:02:18,268 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash 526284836, now seen corresponding path program 41 times [2022-01-31 20:02:18,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:18,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999093550] [2022-01-31 20:02:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:18,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:18,272 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:18,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:18,276 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:19,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:19,328 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:19,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999093550] [2022-01-31 20:02:19,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [999093550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:19,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:19,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:02:19,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237964427] [2022-01-31 20:02:19,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:19,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:02:19,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:02:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:02:19,330 INFO L87 Difference]: Start difference. First operand 307 states and 433 transitions. Second operand has 46 states, 45 states have (on average 4.8) internal successors, (216), 44 states have internal predecessors, (216), 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 20:02:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:21,603 INFO L93 Difference]: Finished difference Result 587 states and 849 transitions. [2022-01-31 20:02:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 20:02:21,603 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.8) internal successors, (216), 44 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2022-01-31 20:02:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:21,605 INFO L225 Difference]: With dead ends: 587 [2022-01-31 20:02:21,605 INFO L226 Difference]: Without dead ends: 574 [2022-01-31 20:02:21,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1043, Invalid=1213, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:02:21,606 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1754 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:21,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1797 Valid, 510 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:02:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-31 20:02:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 314. [2022-01-31 20:02:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 308 states have (on average 1.422077922077922) internal successors, (438), 308 states have internal predecessors, (438), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 443 transitions. [2022-01-31 20:02:21,766 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 443 transitions. Word has length 220 [2022-01-31 20:02:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:21,766 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 443 transitions. [2022-01-31 20:02:21,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.8) internal successors, (216), 44 states have internal predecessors, (216), 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 20:02:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 443 transitions. [2022-01-31 20:02:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 20:02:21,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:21,768 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:21,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 20:02:21,768 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash -573506493, now seen corresponding path program 42 times [2022-01-31 20:02:21,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:21,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043080119] [2022-01-31 20:02:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:21,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:21,772 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:21,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:21,777 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:22,799 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:22,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043080119] [2022-01-31 20:02:22,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043080119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:22,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:22,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:02:22,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931746838] [2022-01-31 20:02:22,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:22,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 20:02:22,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 20:02:22,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:02:22,801 INFO L87 Difference]: Start difference. First operand 314 states and 443 transitions. Second operand has 47 states, 46 states have (on average 4.804347826086956) internal successors, (221), 45 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 20:02:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:25,122 INFO L93 Difference]: Finished difference Result 600 states and 868 transitions. [2022-01-31 20:02:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 20:02:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.804347826086956) internal successors, (221), 45 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) Word has length 225 [2022-01-31 20:02:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:25,130 INFO L225 Difference]: With dead ends: 600 [2022-01-31 20:02:25,130 INFO L226 Difference]: Without dead ends: 587 [2022-01-31 20:02:25,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1089, Invalid=1263, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:02:25,131 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1540 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1584 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:25,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1584 Valid, 521 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:02:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-01-31 20:02:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 321. [2022-01-31 20:02:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 315 states have (on average 1.4222222222222223) internal successors, (448), 315 states have internal predecessors, (448), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 453 transitions. [2022-01-31 20:02:25,288 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 453 transitions. Word has length 225 [2022-01-31 20:02:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:25,288 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 453 transitions. [2022-01-31 20:02:25,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.804347826086956) internal successors, (221), 45 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 20:02:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 453 transitions. [2022-01-31 20:02:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 20:02:25,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:25,289 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:25,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 20:02:25,290 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:25,290 INFO L85 PathProgramCache]: Analyzing trace with hash -885574780, now seen corresponding path program 43 times [2022-01-31 20:02:25,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:25,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930969511] [2022-01-31 20:02:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:25,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:25,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:25,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:25,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:26,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:26,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:26,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930969511] [2022-01-31 20:02:26,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [930969511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:26,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:26,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 20:02:26,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021462548] [2022-01-31 20:02:26,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:26,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:02:26,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:26,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:02:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:02:26,356 INFO L87 Difference]: Start difference. First operand 321 states and 453 transitions. Second operand has 48 states, 47 states have (on average 4.808510638297872) internal successors, (226), 46 states have internal predecessors, (226), 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 20:02:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:28,868 INFO L93 Difference]: Finished difference Result 613 states and 887 transitions. [2022-01-31 20:02:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 20:02:28,869 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.808510638297872) internal successors, (226), 46 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-01-31 20:02:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:28,870 INFO L225 Difference]: With dead ends: 613 [2022-01-31 20:02:28,870 INFO L226 Difference]: Without dead ends: 600 [2022-01-31 20:02:28,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1136, Invalid=1314, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:02:28,871 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1622 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:28,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 537 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:02:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-31 20:02:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 328. [2022-01-31 20:02:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.4223602484472049) internal successors, (458), 322 states have internal predecessors, (458), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 463 transitions. [2022-01-31 20:02:29,037 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 463 transitions. Word has length 230 [2022-01-31 20:02:29,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:29,037 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 463 transitions. [2022-01-31 20:02:29,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.808510638297872) internal successors, (226), 46 states have internal predecessors, (226), 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 20:02:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 463 transitions. [2022-01-31 20:02:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 20:02:29,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:29,039 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:29,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 20:02:29,039 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:29,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1761190685, now seen corresponding path program 44 times [2022-01-31 20:02:29,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:29,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495320044] [2022-01-31 20:02:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:29,042 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:29,042 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:29,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:29,048 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:30,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:30,195 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:30,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495320044] [2022-01-31 20:02:30,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [495320044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:30,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:30,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:02:30,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163363087] [2022-01-31 20:02:30,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:30,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 20:02:30,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 20:02:30,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:02:30,196 INFO L87 Difference]: Start difference. First operand 328 states and 463 transitions. Second operand has 49 states, 48 states have (on average 4.8125) internal successors, (231), 47 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 20:02:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:32,781 INFO L93 Difference]: Finished difference Result 626 states and 906 transitions. [2022-01-31 20:02:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:02:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 4.8125) internal successors, (231), 47 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) Word has length 235 [2022-01-31 20:02:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:32,783 INFO L225 Difference]: With dead ends: 626 [2022-01-31 20:02:32,783 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 20:02:32,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1184, Invalid=1366, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:02:32,784 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2272 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2318 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:32,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2318 Valid, 537 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:02:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 20:02:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 335. [2022-01-31 20:02:32,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 329 states have (on average 1.4224924012158056) internal successors, (468), 329 states have internal predecessors, (468), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 473 transitions. [2022-01-31 20:02:32,959 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 473 transitions. Word has length 235 [2022-01-31 20:02:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:32,960 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 473 transitions. [2022-01-31 20:02:32,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 4.8125) internal successors, (231), 47 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 20:02:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 473 transitions. [2022-01-31 20:02:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-01-31 20:02:32,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:32,961 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:32,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 20:02:32,962 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1835349732, now seen corresponding path program 45 times [2022-01-31 20:02:32,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:32,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669297992] [2022-01-31 20:02:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:32,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:32,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:32,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:32,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:34,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:34,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669297992] [2022-01-31 20:02:34,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [669297992] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:34,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:34,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 20:02:34,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771815248] [2022-01-31 20:02:34,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:34,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 20:02:34,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:34,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 20:02:34,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:02:34,193 INFO L87 Difference]: Start difference. First operand 335 states and 473 transitions. Second operand has 50 states, 49 states have (on average 4.816326530612245) internal successors, (236), 48 states have internal predecessors, (236), 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 20:02:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:36,909 INFO L93 Difference]: Finished difference Result 639 states and 925 transitions. [2022-01-31 20:02:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 20:02:36,909 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 4.816326530612245) internal successors, (236), 48 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 240 [2022-01-31 20:02:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:36,911 INFO L225 Difference]: With dead ends: 639 [2022-01-31 20:02:36,911 INFO L226 Difference]: Without dead ends: 626 [2022-01-31 20:02:36,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1233, Invalid=1419, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:02:36,912 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1647 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:36,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1694 Valid, 564 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:02:36,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-31 20:02:37,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 342. [2022-01-31 20:02:37,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 336 states have (on average 1.4226190476190477) internal successors, (478), 336 states have internal predecessors, (478), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 483 transitions. [2022-01-31 20:02:37,085 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 483 transitions. Word has length 240 [2022-01-31 20:02:37,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:37,085 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 483 transitions. [2022-01-31 20:02:37,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 4.816326530612245) internal successors, (236), 48 states have internal predecessors, (236), 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 20:02:37,085 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 483 transitions. [2022-01-31 20:02:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 20:02:37,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:37,086 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:37,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 20:02:37,087 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:37,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:37,087 INFO L85 PathProgramCache]: Analyzing trace with hash -470583933, now seen corresponding path program 46 times [2022-01-31 20:02:37,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:37,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171075463] [2022-01-31 20:02:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:37,090 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:37,090 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:37,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:37,096 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:38,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:38,302 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 20:02:38,303 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:38,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171075463] [2022-01-31 20:02:38,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171075463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:38,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:38,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 20:02:38,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086386831] [2022-01-31 20:02:38,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:38,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 20:02:38,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:38,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 20:02:38,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:02:38,304 INFO L87 Difference]: Start difference. First operand 342 states and 483 transitions. Second operand has 51 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 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 20:02:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:41,128 INFO L93 Difference]: Finished difference Result 652 states and 944 transitions. [2022-01-31 20:02:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:02:41,128 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-01-31 20:02:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:41,130 INFO L225 Difference]: With dead ends: 652 [2022-01-31 20:02:41,130 INFO L226 Difference]: Without dead ends: 639 [2022-01-31 20:02:41,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1283, Invalid=1473, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:02:41,131 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1914 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1962 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:41,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1962 Valid, 563 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:02:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-31 20:02:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 349. [2022-01-31 20:02:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 343 states have (on average 1.4227405247813412) internal successors, (488), 343 states have internal predecessors, (488), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 493 transitions. [2022-01-31 20:02:41,313 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 493 transitions. Word has length 245 [2022-01-31 20:02:41,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:41,313 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 493 transitions. [2022-01-31 20:02:41,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.82) internal successors, (241), 49 states have internal predecessors, (241), 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 20:02:41,314 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 493 transitions. [2022-01-31 20:02:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 20:02:41,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:41,315 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:41,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 20:02:41,315 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:41,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash 837714500, now seen corresponding path program 47 times [2022-01-31 20:02:41,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:41,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295908547] [2022-01-31 20:02:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:41,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:41,318 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:41,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:41,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:42,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:42,563 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:42,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295908547] [2022-01-31 20:02:42,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1295908547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:42,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:42,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 20:02:42,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519861793] [2022-01-31 20:02:42,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:42,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 20:02:42,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:42,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 20:02:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:02:42,564 INFO L87 Difference]: Start difference. First operand 349 states and 493 transitions. Second operand has 52 states, 51 states have (on average 4.823529411764706) internal successors, (246), 50 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:45,555 INFO L93 Difference]: Finished difference Result 665 states and 963 transitions. [2022-01-31 20:02:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 20:02:45,556 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.823529411764706) internal successors, (246), 50 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2022-01-31 20:02:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:45,558 INFO L225 Difference]: With dead ends: 665 [2022-01-31 20:02:45,558 INFO L226 Difference]: Without dead ends: 652 [2022-01-31 20:02:45,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1334, Invalid=1528, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 20:02:45,559 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2019 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:45,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2068 Valid, 584 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:02:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-31 20:02:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 356. [2022-01-31 20:02:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 350 states have (on average 1.4228571428571428) internal successors, (498), 350 states have internal predecessors, (498), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 503 transitions. [2022-01-31 20:02:45,833 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 503 transitions. Word has length 250 [2022-01-31 20:02:45,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:45,833 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 503 transitions. [2022-01-31 20:02:45,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.823529411764706) internal successors, (246), 50 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 503 transitions. [2022-01-31 20:02:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 20:02:45,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:45,835 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:45,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 20:02:45,836 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:45,836 INFO L85 PathProgramCache]: Analyzing trace with hash 743589411, now seen corresponding path program 48 times [2022-01-31 20:02:45,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:45,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417512591] [2022-01-31 20:02:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:45,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:45,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:45,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:45,845 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:47,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:47,117 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417512591] [2022-01-31 20:02:47,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [417512591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:47,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:47,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 20:02:47,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917389360] [2022-01-31 20:02:47,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:47,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 20:02:47,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 20:02:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:02:47,119 INFO L87 Difference]: Start difference. First operand 356 states and 503 transitions. Second operand has 53 states, 52 states have (on average 4.826923076923077) internal successors, (251), 51 states have internal predecessors, (251), 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 20:02:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:50,254 INFO L93 Difference]: Finished difference Result 678 states and 982 transitions. [2022-01-31 20:02:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 20:02:50,255 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.826923076923077) internal successors, (251), 51 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 20:02:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:50,257 INFO L225 Difference]: With dead ends: 678 [2022-01-31 20:02:50,257 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 20:02:50,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1386, Invalid=1584, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 20:02:50,258 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1583 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:50,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 603 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:02:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 20:02:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 363. [2022-01-31 20:02:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 357 states have (on average 1.42296918767507) internal successors, (508), 357 states have internal predecessors, (508), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 513 transitions. [2022-01-31 20:02:50,451 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 513 transitions. Word has length 255 [2022-01-31 20:02:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:50,451 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 513 transitions. [2022-01-31 20:02:50,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.826923076923077) internal successors, (251), 51 states have internal predecessors, (251), 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 20:02:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 513 transitions. [2022-01-31 20:02:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-31 20:02:50,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:50,453 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:50,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 20:02:50,453 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1968772516, now seen corresponding path program 49 times [2022-01-31 20:02:50,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:50,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570115890] [2022-01-31 20:02:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:50,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:50,456 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:50,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:50,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:51,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:51,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:51,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570115890] [2022-01-31 20:02:51,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570115890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:51,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:51,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 20:02:51,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936800555] [2022-01-31 20:02:51,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:51,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 20:02:51,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:51,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 20:02:51,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 20:02:51,743 INFO L87 Difference]: Start difference. First operand 363 states and 513 transitions. Second operand has 54 states, 53 states have (on average 4.830188679245283) internal successors, (256), 52 states have internal predecessors, (256), 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 20:02:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:55,098 INFO L93 Difference]: Finished difference Result 691 states and 1001 transitions. [2022-01-31 20:02:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 20:02:55,099 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.830188679245283) internal successors, (256), 52 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2022-01-31 20:02:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:55,101 INFO L225 Difference]: With dead ends: 691 [2022-01-31 20:02:55,101 INFO L226 Difference]: Without dead ends: 678 [2022-01-31 20:02:55,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1439, Invalid=1641, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 20:02:55,102 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1868 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:55,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1919 Valid, 613 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:02:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-31 20:02:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 370. [2022-01-31 20:02:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 364 states have (on average 1.4230769230769231) internal successors, (518), 364 states have internal predecessors, (518), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:02:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 523 transitions. [2022-01-31 20:02:55,304 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 523 transitions. Word has length 260 [2022-01-31 20:02:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:55,305 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 523 transitions. [2022-01-31 20:02:55,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.830188679245283) internal successors, (256), 52 states have internal predecessors, (256), 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 20:02:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 523 transitions. [2022-01-31 20:02:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 20:02:55,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:55,306 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:55,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 20:02:55,306 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash -144912701, now seen corresponding path program 50 times [2022-01-31 20:02:55,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:55,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863063003] [2022-01-31 20:02:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:55,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:55,309 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:55,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:55,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:56,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:56,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863063003] [2022-01-31 20:02:56,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863063003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:56,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:56,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 20:02:56,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182852078] [2022-01-31 20:02:56,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:56,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 20:02:56,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:56,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 20:02:56,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 20:02:56,669 INFO L87 Difference]: Start difference. First operand 370 states and 523 transitions. Second operand has 55 states, 54 states have (on average 4.833333333333333) internal successors, (261), 53 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:00,231 INFO L93 Difference]: Finished difference Result 704 states and 1020 transitions. [2022-01-31 20:03:00,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 20:03:00,232 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 4.833333333333333) internal successors, (261), 53 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-01-31 20:03:00,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:00,234 INFO L225 Difference]: With dead ends: 704 [2022-01-31 20:03:00,234 INFO L226 Difference]: Without dead ends: 691 [2022-01-31 20:03:00,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1493, Invalid=1699, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 20:03:00,234 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2277 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:00,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2329 Valid, 621 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:03:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-31 20:03:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 377. [2022-01-31 20:03:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 371 states have (on average 1.4231805929919137) internal successors, (528), 371 states have internal predecessors, (528), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 533 transitions. [2022-01-31 20:03:00,453 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 533 transitions. Word has length 265 [2022-01-31 20:03:00,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:00,454 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 533 transitions. [2022-01-31 20:03:00,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 4.833333333333333) internal successors, (261), 53 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 533 transitions. [2022-01-31 20:03:00,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 20:03:00,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:00,455 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:00,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 20:03:00,455 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash 615182596, now seen corresponding path program 51 times [2022-01-31 20:03:00,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:00,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512419257] [2022-01-31 20:03:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:00,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:00,458 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:00,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:00,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:01,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:01,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:01,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512419257] [2022-01-31 20:03:01,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [512419257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:01,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:01,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 20:03:01,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138824386] [2022-01-31 20:03:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:01,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 20:03:01,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 20:03:01,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 20:03:01,861 INFO L87 Difference]: Start difference. First operand 377 states and 533 transitions. Second operand has 56 states, 55 states have (on average 4.836363636363636) internal successors, (266), 54 states have internal predecessors, (266), 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 20:03:05,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:05,768 INFO L93 Difference]: Finished difference Result 717 states and 1039 transitions. [2022-01-31 20:03:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 20:03:05,768 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 4.836363636363636) internal successors, (266), 54 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-01-31 20:03:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:05,771 INFO L225 Difference]: With dead ends: 717 [2022-01-31 20:03:05,771 INFO L226 Difference]: Without dead ends: 704 [2022-01-31 20:03:05,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1548, Invalid=1758, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 20:03:05,772 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1958 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:05,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2011 Valid, 646 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:03:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-01-31 20:03:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 384. [2022-01-31 20:03:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.4232804232804233) internal successors, (538), 378 states have internal predecessors, (538), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 543 transitions. [2022-01-31 20:03:05,998 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 543 transitions. Word has length 270 [2022-01-31 20:03:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:05,999 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 543 transitions. [2022-01-31 20:03:05,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 4.836363636363636) internal successors, (266), 54 states have internal predecessors, (266), 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 20:03:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 543 transitions. [2022-01-31 20:03:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 20:03:06,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:06,001 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:06,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 20:03:06,001 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1949495453, now seen corresponding path program 52 times [2022-01-31 20:03:06,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:06,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444262619] [2022-01-31 20:03:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:06,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:06,004 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:06,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:06,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:07,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:07,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444262619] [2022-01-31 20:03:07,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444262619] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:07,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:07,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 20:03:07,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024090643] [2022-01-31 20:03:07,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:07,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 20:03:07,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 20:03:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 20:03:07,645 INFO L87 Difference]: Start difference. First operand 384 states and 543 transitions. Second operand has 57 states, 56 states have (on average 4.839285714285714) internal successors, (271), 55 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 20:03:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:11,789 INFO L93 Difference]: Finished difference Result 730 states and 1058 transitions. [2022-01-31 20:03:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:03:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 4.839285714285714) internal successors, (271), 55 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) Word has length 275 [2022-01-31 20:03:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:11,792 INFO L225 Difference]: With dead ends: 730 [2022-01-31 20:03:11,792 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 20:03:11,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1604, Invalid=1818, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:03:11,793 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2125 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2179 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:11,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2179 Valid, 647 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:03:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 20:03:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 391. [2022-01-31 20:03:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 385 states have (on average 1.4233766233766234) internal successors, (548), 385 states have internal predecessors, (548), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 553 transitions. [2022-01-31 20:03:12,040 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 553 transitions. Word has length 275 [2022-01-31 20:03:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:12,040 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 553 transitions. [2022-01-31 20:03:12,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 4.839285714285714) internal successors, (271), 55 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 20:03:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 553 transitions. [2022-01-31 20:03:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-31 20:03:12,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:12,041 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:12,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 20:03:12,041 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash 493491300, now seen corresponding path program 53 times [2022-01-31 20:03:12,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:12,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224665489] [2022-01-31 20:03:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:12,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:12,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:12,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:12,050 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:13,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:13,479 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:13,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224665489] [2022-01-31 20:03:13,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [224665489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:13,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:13,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 20:03:13,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536718558] [2022-01-31 20:03:13,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:13,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 20:03:13,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:13,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 20:03:13,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 20:03:13,481 INFO L87 Difference]: Start difference. First operand 391 states and 553 transitions. Second operand has 58 states, 57 states have (on average 4.842105263157895) internal successors, (276), 56 states have internal predecessors, (276), 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 20:03:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:17,892 INFO L93 Difference]: Finished difference Result 743 states and 1077 transitions. [2022-01-31 20:03:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 20:03:17,893 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.842105263157895) internal successors, (276), 56 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2022-01-31 20:03:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:17,895 INFO L225 Difference]: With dead ends: 743 [2022-01-31 20:03:17,895 INFO L226 Difference]: Without dead ends: 730 [2022-01-31 20:03:17,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1661, Invalid=1879, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 20:03:17,896 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2089 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2144 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:17,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2144 Valid, 662 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:03:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-01-31 20:03:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 398. [2022-01-31 20:03:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 392 states have (on average 1.4234693877551021) internal successors, (558), 392 states have internal predecessors, (558), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 563 transitions. [2022-01-31 20:03:18,132 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 563 transitions. Word has length 280 [2022-01-31 20:03:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:18,132 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 563 transitions. [2022-01-31 20:03:18,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.842105263157895) internal successors, (276), 56 states have internal predecessors, (276), 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 20:03:18,133 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 563 transitions. [2022-01-31 20:03:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 20:03:18,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:18,134 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:18,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 20:03:18,134 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:18,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1881339901, now seen corresponding path program 54 times [2022-01-31 20:03:18,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:18,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310138370] [2022-01-31 20:03:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:18,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:18,137 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:18,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:18,145 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:19,721 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:19,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310138370] [2022-01-31 20:03:19,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310138370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:19,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:19,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 20:03:19,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590343029] [2022-01-31 20:03:19,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:19,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 20:03:19,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:19,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 20:03:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:03:19,723 INFO L87 Difference]: Start difference. First operand 398 states and 563 transitions. Second operand has 59 states, 58 states have (on average 4.844827586206897) internal successors, (281), 57 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:24,310 INFO L93 Difference]: Finished difference Result 756 states and 1096 transitions. [2022-01-31 20:03:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 20:03:24,311 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.844827586206897) internal successors, (281), 57 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-01-31 20:03:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:24,313 INFO L225 Difference]: With dead ends: 756 [2022-01-31 20:03:24,313 INFO L226 Difference]: Without dead ends: 743 [2022-01-31 20:03:24,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1719, Invalid=1941, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 20:03:24,313 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2765 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2821 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:24,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2821 Valid, 665 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:03:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-31 20:03:24,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 405. [2022-01-31 20:03:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 399 states have (on average 1.4235588972431077) internal successors, (568), 399 states have internal predecessors, (568), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 573 transitions. [2022-01-31 20:03:24,557 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 573 transitions. Word has length 285 [2022-01-31 20:03:24,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:24,558 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 573 transitions. [2022-01-31 20:03:24,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.844827586206897) internal successors, (281), 57 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:24,558 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 573 transitions. [2022-01-31 20:03:24,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 20:03:24,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:24,559 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:24,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 20:03:24,559 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1919123516, now seen corresponding path program 55 times [2022-01-31 20:03:24,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:24,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501185912] [2022-01-31 20:03:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:24,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:24,562 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:24,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:24,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:26,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:26,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501185912] [2022-01-31 20:03:26,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [501185912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:26,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:26,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 20:03:26,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820049890] [2022-01-31 20:03:26,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:26,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 20:03:26,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 20:03:26,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 20:03:26,174 INFO L87 Difference]: Start difference. First operand 405 states and 573 transitions. Second operand has 60 states, 59 states have (on average 4.8474576271186445) internal successors, (286), 58 states have internal predecessors, (286), 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 20:03:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:30,976 INFO L93 Difference]: Finished difference Result 769 states and 1115 transitions. [2022-01-31 20:03:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 20:03:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.8474576271186445) internal successors, (286), 58 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2022-01-31 20:03:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:30,978 INFO L225 Difference]: With dead ends: 769 [2022-01-31 20:03:30,978 INFO L226 Difference]: Without dead ends: 756 [2022-01-31 20:03:30,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1778, Invalid=2004, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 20:03:30,979 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2144 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2201 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:30,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2201 Valid, 684 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:03:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-01-31 20:03:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 412. [2022-01-31 20:03:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 406 states have (on average 1.4236453201970443) internal successors, (578), 406 states have internal predecessors, (578), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 583 transitions. [2022-01-31 20:03:31,247 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 583 transitions. Word has length 290 [2022-01-31 20:03:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:31,247 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 583 transitions. [2022-01-31 20:03:31,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.8474576271186445) internal successors, (286), 58 states have internal predecessors, (286), 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 20:03:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 583 transitions. [2022-01-31 20:03:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 20:03:31,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:31,249 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:31,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 20:03:31,249 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:31,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1454983005, now seen corresponding path program 56 times [2022-01-31 20:03:31,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:31,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39943815] [2022-01-31 20:03:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:31,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:31,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:31,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:31,261 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:33,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:33,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:33,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39943815] [2022-01-31 20:03:33,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [39943815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:33,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:33,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 20:03:33,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826129349] [2022-01-31 20:03:33,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:33,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 20:03:33,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 20:03:33,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 20:03:33,071 INFO L87 Difference]: Start difference. First operand 412 states and 583 transitions. Second operand has 61 states, 60 states have (on average 4.85) internal successors, (291), 59 states have internal predecessors, (291), 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 20:03:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:38,241 INFO L93 Difference]: Finished difference Result 782 states and 1134 transitions. [2022-01-31 20:03:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 20:03:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 4.85) internal successors, (291), 59 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-01-31 20:03:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:38,244 INFO L225 Difference]: With dead ends: 782 [2022-01-31 20:03:38,244 INFO L226 Difference]: Without dead ends: 769 [2022-01-31 20:03:38,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1838, Invalid=2068, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 20:03:38,244 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2335 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2393 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:38,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2393 Valid, 700 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:03:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-31 20:03:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 419. [2022-01-31 20:03:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 413 states have (on average 1.423728813559322) internal successors, (588), 413 states have internal predecessors, (588), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 593 transitions. [2022-01-31 20:03:38,505 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 593 transitions. Word has length 295 [2022-01-31 20:03:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:38,506 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 593 transitions. [2022-01-31 20:03:38,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 4.85) internal successors, (291), 59 states have internal predecessors, (291), 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 20:03:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 593 transitions. [2022-01-31 20:03:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-01-31 20:03:38,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:38,507 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:38,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 20:03:38,507 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:38,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1405629220, now seen corresponding path program 57 times [2022-01-31 20:03:38,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:38,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060629359] [2022-01-31 20:03:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:38,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:38,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:38,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:38,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:40,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:40,117 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:40,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060629359] [2022-01-31 20:03:40,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2060629359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:40,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:40,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 20:03:40,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296499866] [2022-01-31 20:03:40,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:40,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 20:03:40,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:40,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 20:03:40,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 20:03:40,119 INFO L87 Difference]: Start difference. First operand 419 states and 593 transitions. Second operand has 62 states, 61 states have (on average 4.852459016393443) internal successors, (296), 60 states have internal predecessors, (296), 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 20:03:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:45,663 INFO L93 Difference]: Finished difference Result 795 states and 1153 transitions. [2022-01-31 20:03:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 20:03:45,664 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 4.852459016393443) internal successors, (296), 60 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2022-01-31 20:03:45,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:45,666 INFO L225 Difference]: With dead ends: 795 [2022-01-31 20:03:45,666 INFO L226 Difference]: Without dead ends: 782 [2022-01-31 20:03:45,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1899, Invalid=2133, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 20:03:45,667 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2588 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2647 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:45,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2647 Valid, 704 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:03:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-31 20:03:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 426. [2022-01-31 20:03:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 420 states have (on average 1.4238095238095239) internal successors, (598), 420 states have internal predecessors, (598), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 603 transitions. [2022-01-31 20:03:45,929 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 603 transitions. Word has length 300 [2022-01-31 20:03:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:45,929 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 603 transitions. [2022-01-31 20:03:45,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 4.852459016393443) internal successors, (296), 60 states have internal predecessors, (296), 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 20:03:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 603 transitions. [2022-01-31 20:03:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 20:03:45,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:45,931 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:45,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 20:03:45,931 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:45,931 INFO L85 PathProgramCache]: Analyzing trace with hash 491004227, now seen corresponding path program 58 times [2022-01-31 20:03:45,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:45,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583250614] [2022-01-31 20:03:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:45,933 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:45,933 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:45,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:45,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:47,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:47,619 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:47,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583250614] [2022-01-31 20:03:47,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [583250614] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:47,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:47,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 20:03:47,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716448198] [2022-01-31 20:03:47,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:47,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 20:03:47,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:47,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 20:03:47,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 20:03:47,621 INFO L87 Difference]: Start difference. First operand 426 states and 603 transitions. Second operand has 63 states, 62 states have (on average 4.854838709677419) internal successors, (301), 61 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 20:03:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:53,331 INFO L93 Difference]: Finished difference Result 808 states and 1172 transitions. [2022-01-31 20:03:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 20:03:53,332 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.854838709677419) internal successors, (301), 61 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) Word has length 305 [2022-01-31 20:03:53,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:53,335 INFO L225 Difference]: With dead ends: 808 [2022-01-31 20:03:53,335 INFO L226 Difference]: Without dead ends: 795 [2022-01-31 20:03:53,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1961, Invalid=2199, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:03:53,336 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2831 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2891 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:53,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2891 Valid, 713 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:03:53,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-31 20:03:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 433. [2022-01-31 20:03:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 427 states have (on average 1.423887587822014) internal successors, (608), 427 states have internal predecessors, (608), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:03:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 613 transitions. [2022-01-31 20:03:53,606 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 613 transitions. Word has length 305 [2022-01-31 20:03:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:53,607 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 613 transitions. [2022-01-31 20:03:53,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.854838709677419) internal successors, (301), 61 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 20:03:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 613 transitions. [2022-01-31 20:03:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-31 20:03:53,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:53,608 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:53,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 20:03:53,608 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1592995460, now seen corresponding path program 59 times [2022-01-31 20:03:53,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:53,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138239088] [2022-01-31 20:03:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:53,611 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:53,611 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:53,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:53,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:55,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:55,382 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:55,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138239088] [2022-01-31 20:03:55,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2138239088] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:55,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:55,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 20:03:55,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44328248] [2022-01-31 20:03:55,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:55,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 20:03:55,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 20:03:55,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 20:03:55,384 INFO L87 Difference]: Start difference. First operand 433 states and 613 transitions. Second operand has 64 states, 63 states have (on average 4.857142857142857) internal successors, (306), 62 states have internal predecessors, (306), 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 20:04:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:01,395 INFO L93 Difference]: Finished difference Result 821 states and 1191 transitions. [2022-01-31 20:04:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 20:04:01,395 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.857142857142857) internal successors, (306), 62 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2022-01-31 20:04:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:01,398 INFO L225 Difference]: With dead ends: 821 [2022-01-31 20:04:01,398 INFO L226 Difference]: Without dead ends: 808 [2022-01-31 20:04:01,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2024, Invalid=2266, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 20:04:01,399 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2808 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2869 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:01,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2869 Valid, 722 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:04:01,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-31 20:04:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 440. [2022-01-31 20:04:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 434 states have (on average 1.423963133640553) internal successors, (618), 434 states have internal predecessors, (618), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 623 transitions. [2022-01-31 20:04:01,689 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 623 transitions. Word has length 310 [2022-01-31 20:04:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:01,689 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 623 transitions. [2022-01-31 20:04:01,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.857142857142857) internal successors, (306), 62 states have internal predecessors, (306), 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 20:04:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 623 transitions. [2022-01-31 20:04:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 20:04:01,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:01,692 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:01,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 20:04:01,692 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:01,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1888436707, now seen corresponding path program 60 times [2022-01-31 20:04:01,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:01,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4179780] [2022-01-31 20:04:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:01,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:01,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:01,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:01,703 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:03,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:03,659 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4179780] [2022-01-31 20:04:03,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [4179780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:03,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:03,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 20:04:03,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023506230] [2022-01-31 20:04:03,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:03,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 20:04:03,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:03,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 20:04:03,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:04:03,662 INFO L87 Difference]: Start difference. First operand 440 states and 623 transitions. Second operand has 65 states, 64 states have (on average 4.859375) internal successors, (311), 63 states have internal predecessors, (311), 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 20:04:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:09,954 INFO L93 Difference]: Finished difference Result 834 states and 1210 transitions. [2022-01-31 20:04:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:04:09,954 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 4.859375) internal successors, (311), 63 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 20:04:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:09,957 INFO L225 Difference]: With dead ends: 834 [2022-01-31 20:04:09,957 INFO L226 Difference]: Without dead ends: 821 [2022-01-31 20:04:09,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2088, Invalid=2334, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 20:04:09,958 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2728 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2790 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:09,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2790 Valid, 742 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:04:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-31 20:04:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 447. [2022-01-31 20:04:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 441 states have (on average 1.4240362811791383) internal successors, (628), 441 states have internal predecessors, (628), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 633 transitions. [2022-01-31 20:04:10,251 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 633 transitions. Word has length 315 [2022-01-31 20:04:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:10,251 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 633 transitions. [2022-01-31 20:04:10,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 4.859375) internal successors, (311), 63 states have internal predecessors, (311), 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 20:04:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 633 transitions. [2022-01-31 20:04:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-31 20:04:10,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:10,253 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:10,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 20:04:10,253 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:10,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash 245592548, now seen corresponding path program 61 times [2022-01-31 20:04:10,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:10,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567513076] [2022-01-31 20:04:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:10,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:10,256 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:10,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:10,262 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:12,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:12,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:12,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567513076] [2022-01-31 20:04:12,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [567513076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:12,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:12,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 20:04:12,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798192113] [2022-01-31 20:04:12,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:12,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 20:04:12,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 20:04:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 20:04:12,086 INFO L87 Difference]: Start difference. First operand 447 states and 633 transitions. Second operand has 66 states, 65 states have (on average 4.861538461538461) internal successors, (316), 64 states have internal predecessors, (316), 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 20:04:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:18,702 INFO L93 Difference]: Finished difference Result 847 states and 1229 transitions. [2022-01-31 20:04:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 20:04:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.861538461538461) internal successors, (316), 64 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 320 [2022-01-31 20:04:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:18,704 INFO L225 Difference]: With dead ends: 847 [2022-01-31 20:04:18,704 INFO L226 Difference]: Without dead ends: 834 [2022-01-31 20:04:18,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2153, Invalid=2403, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 20:04:18,705 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2656 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2719 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:18,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2719 Valid, 750 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:04:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-01-31 20:04:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 454. [2022-01-31 20:04:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 448 states have (on average 1.4241071428571428) internal successors, (638), 448 states have internal predecessors, (638), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 643 transitions. [2022-01-31 20:04:19,015 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 643 transitions. Word has length 320 [2022-01-31 20:04:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:19,016 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 643 transitions. [2022-01-31 20:04:19,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.861538461538461) internal successors, (316), 64 states have internal predecessors, (316), 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 20:04:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 643 transitions. [2022-01-31 20:04:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-31 20:04:19,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:19,017 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:19,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 20:04:19,018 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:19,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 123869827, now seen corresponding path program 62 times [2022-01-31 20:04:19,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:19,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075445338] [2022-01-31 20:04:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:19,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:19,020 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:19,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:19,027 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:20,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:20,898 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:20,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075445338] [2022-01-31 20:04:20,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075445338] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:20,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:20,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 20:04:20,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587249480] [2022-01-31 20:04:20,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:20,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 20:04:20,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:20,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 20:04:20,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 20:04:20,900 INFO L87 Difference]: Start difference. First operand 454 states and 643 transitions. Second operand has 67 states, 66 states have (on average 4.863636363636363) internal successors, (321), 65 states have internal predecessors, (321), 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 20:04:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:27,903 INFO L93 Difference]: Finished difference Result 860 states and 1248 transitions. [2022-01-31 20:04:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 20:04:27,903 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.863636363636363) internal successors, (321), 65 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 325 [2022-01-31 20:04:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:27,905 INFO L225 Difference]: With dead ends: 860 [2022-01-31 20:04:27,905 INFO L226 Difference]: Without dead ends: 847 [2022-01-31 20:04:27,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2219, Invalid=2473, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:04:27,906 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2828 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2892 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:27,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2892 Valid, 772 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:04:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-01-31 20:04:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 461. [2022-01-31 20:04:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 455 states have (on average 1.4241758241758242) internal successors, (648), 455 states have internal predecessors, (648), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 653 transitions. [2022-01-31 20:04:28,228 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 653 transitions. Word has length 325 [2022-01-31 20:04:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:28,228 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 653 transitions. [2022-01-31 20:04:28,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.863636363636363) internal successors, (321), 65 states have internal predecessors, (321), 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 20:04:28,228 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 653 transitions. [2022-01-31 20:04:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-01-31 20:04:28,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:28,229 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:28,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 20:04:28,230 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:28,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:28,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1830879932, now seen corresponding path program 63 times [2022-01-31 20:04:28,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:28,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073025591] [2022-01-31 20:04:28,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:28,232 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:28,232 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:28,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:28,240 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:30,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:30,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:30,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073025591] [2022-01-31 20:04:30,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1073025591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:30,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:30,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 20:04:30,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845684311] [2022-01-31 20:04:30,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:30,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 20:04:30,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:30,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 20:04:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 20:04:30,133 INFO L87 Difference]: Start difference. First operand 461 states and 653 transitions. Second operand has 68 states, 67 states have (on average 4.865671641791045) internal successors, (326), 66 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:37,440 INFO L93 Difference]: Finished difference Result 873 states and 1267 transitions. [2022-01-31 20:04:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 20:04:37,441 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.865671641791045) internal successors, (326), 66 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2022-01-31 20:04:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:37,442 INFO L225 Difference]: With dead ends: 873 [2022-01-31 20:04:37,442 INFO L226 Difference]: Without dead ends: 860 [2022-01-31 20:04:37,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2286, Invalid=2544, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 20:04:37,443 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2351 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2416 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:37,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2416 Valid, 776 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:04:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-01-31 20:04:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 468. [2022-01-31 20:04:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 462 states have (on average 1.4242424242424243) internal successors, (658), 462 states have internal predecessors, (658), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 663 transitions. [2022-01-31 20:04:37,773 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 663 transitions. Word has length 330 [2022-01-31 20:04:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:37,773 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 663 transitions. [2022-01-31 20:04:37,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.865671641791045) internal successors, (326), 66 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 663 transitions. [2022-01-31 20:04:37,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 20:04:37,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:37,776 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:37,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 20:04:37,776 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:37,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash -982078685, now seen corresponding path program 64 times [2022-01-31 20:04:37,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:37,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114529143] [2022-01-31 20:04:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:37,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:37,779 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:37,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:37,788 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:39,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:39,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:39,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114529143] [2022-01-31 20:04:39,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [114529143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:39,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:39,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 20:04:39,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658007327] [2022-01-31 20:04:39,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:39,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 20:04:39,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 20:04:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:04:39,841 INFO L87 Difference]: Start difference. First operand 468 states and 663 transitions. Second operand has 69 states, 68 states have (on average 4.867647058823529) internal successors, (331), 67 states have internal predecessors, (331), 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 20:04:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:47,556 INFO L93 Difference]: Finished difference Result 886 states and 1286 transitions. [2022-01-31 20:04:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 20:04:47,557 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 4.867647058823529) internal successors, (331), 67 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2022-01-31 20:04:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:47,558 INFO L225 Difference]: With dead ends: 886 [2022-01-31 20:04:47,558 INFO L226 Difference]: Without dead ends: 873 [2022-01-31 20:04:47,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2354, Invalid=2616, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:04:47,559 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2495 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2561 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:47,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2561 Valid, 788 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:04:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-01-31 20:04:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 475. [2022-01-31 20:04:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 469 states have (on average 1.4243070362473347) internal successors, (668), 469 states have internal predecessors, (668), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 673 transitions. [2022-01-31 20:04:47,901 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 673 transitions. Word has length 335 [2022-01-31 20:04:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:47,902 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 673 transitions. [2022-01-31 20:04:47,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 4.867647058823529) internal successors, (331), 67 states have internal predecessors, (331), 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 20:04:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 673 transitions. [2022-01-31 20:04:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-01-31 20:04:47,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:47,903 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:47,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 20:04:47,903 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:47,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1277939876, now seen corresponding path program 65 times [2022-01-31 20:04:47,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:47,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675731922] [2022-01-31 20:04:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:47,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:47,906 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:47,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:47,915 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:49,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:49,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675731922] [2022-01-31 20:04:49,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675731922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:49,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:49,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 20:04:49,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150307609] [2022-01-31 20:04:49,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:49,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 20:04:49,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 20:04:49,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 20:04:49,924 INFO L87 Difference]: Start difference. First operand 475 states and 673 transitions. Second operand has 70 states, 69 states have (on average 4.869565217391305) internal successors, (336), 68 states have internal predecessors, (336), 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 20:04:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:58,095 INFO L93 Difference]: Finished difference Result 899 states and 1305 transitions. [2022-01-31 20:04:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 20:04:58,095 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 4.869565217391305) internal successors, (336), 68 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 340 [2022-01-31 20:04:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:58,097 INFO L225 Difference]: With dead ends: 899 [2022-01-31 20:04:58,097 INFO L226 Difference]: Without dead ends: 886 [2022-01-31 20:04:58,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2423, Invalid=2689, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 20:04:58,098 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2303 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2370 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:58,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2370 Valid, 794 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:04:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-31 20:04:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 482. [2022-01-31 20:04:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 476 states have (on average 1.4243697478991597) internal successors, (678), 476 states have internal predecessors, (678), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:04:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 683 transitions. [2022-01-31 20:04:58,466 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 683 transitions. Word has length 340 [2022-01-31 20:04:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:58,466 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 683 transitions. [2022-01-31 20:04:58,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 4.869565217391305) internal successors, (336), 68 states have internal predecessors, (336), 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 20:04:58,466 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 683 transitions. [2022-01-31 20:04:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-31 20:04:58,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:58,468 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:58,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 20:04:58,468 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:58,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1375276093, now seen corresponding path program 66 times [2022-01-31 20:04:58,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:58,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539917481] [2022-01-31 20:04:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:58,471 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:58,471 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:58,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:58,481 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:00,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:00,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:00,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539917481] [2022-01-31 20:05:00,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [539917481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:00,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:00,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 20:05:00,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967185436] [2022-01-31 20:05:00,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:00,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 20:05:00,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:00,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 20:05:00,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:05:00,570 INFO L87 Difference]: Start difference. First operand 482 states and 683 transitions. Second operand has 71 states, 70 states have (on average 4.871428571428571) internal successors, (341), 69 states have internal predecessors, (341), 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 20:05:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:09,460 INFO L93 Difference]: Finished difference Result 912 states and 1324 transitions. [2022-01-31 20:05:09,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 20:05:09,461 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.871428571428571) internal successors, (341), 69 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 345 [2022-01-31 20:05:09,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:09,462 INFO L225 Difference]: With dead ends: 912 [2022-01-31 20:05:09,462 INFO L226 Difference]: Without dead ends: 899 [2022-01-31 20:05:09,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2493, Invalid=2763, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 20:05:09,463 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2739 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2807 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:09,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2807 Valid, 829 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:05:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-01-31 20:05:09,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 489. [2022-01-31 20:05:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 483 states have (on average 1.4244306418219461) internal successors, (688), 483 states have internal predecessors, (688), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 693 transitions. [2022-01-31 20:05:09,842 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 693 transitions. Word has length 345 [2022-01-31 20:05:09,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:09,843 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 693 transitions. [2022-01-31 20:05:09,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.871428571428571) internal successors, (341), 69 states have internal predecessors, (341), 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 20:05:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 693 transitions. [2022-01-31 20:05:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-31 20:05:09,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:09,845 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:09,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 20:05:09,845 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash 730852356, now seen corresponding path program 67 times [2022-01-31 20:05:09,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:09,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586757273] [2022-01-31 20:05:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:09,848 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:09,848 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:09,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:09,858 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:11,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:11,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:11,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586757273] [2022-01-31 20:05:11,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [586757273] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:11,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:11,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 20:05:11,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931699038] [2022-01-31 20:05:11,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:11,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 20:05:11,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:11,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 20:05:11,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 20:05:11,979 INFO L87 Difference]: Start difference. First operand 489 states and 693 transitions. Second operand has 72 states, 71 states have (on average 4.873239436619718) internal successors, (346), 70 states have internal predecessors, (346), 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 20:05:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:21,262 INFO L93 Difference]: Finished difference Result 925 states and 1343 transitions. [2022-01-31 20:05:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 20:05:21,263 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 4.873239436619718) internal successors, (346), 70 states have internal predecessors, (346), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-01-31 20:05:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:21,265 INFO L225 Difference]: With dead ends: 925 [2022-01-31 20:05:21,265 INFO L226 Difference]: Without dead ends: 912 [2022-01-31 20:05:21,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2564, Invalid=2838, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 20:05:21,266 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2981 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3050 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:21,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3050 Valid, 825 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:05:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-01-31 20:05:21,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 496. [2022-01-31 20:05:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 490 states have (on average 1.4244897959183673) internal successors, (698), 490 states have internal predecessors, (698), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 703 transitions. [2022-01-31 20:05:21,640 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 703 transitions. Word has length 350 [2022-01-31 20:05:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:21,640 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 703 transitions. [2022-01-31 20:05:21,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 4.873239436619718) internal successors, (346), 70 states have internal predecessors, (346), 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 20:05:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 703 transitions. [2022-01-31 20:05:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 20:05:21,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:21,642 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:21,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 20:05:21,642 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:21,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2083720093, now seen corresponding path program 68 times [2022-01-31 20:05:21,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:21,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308509441] [2022-01-31 20:05:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:21,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:21,644 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:21,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:21,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:23,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:23,871 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:23,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308509441] [2022-01-31 20:05:23,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308509441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:23,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:23,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 20:05:23,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427494503] [2022-01-31 20:05:23,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:23,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 20:05:23,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 20:05:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 20:05:23,873 INFO L87 Difference]: Start difference. First operand 496 states and 703 transitions. Second operand has 73 states, 72 states have (on average 4.875) internal successors, (351), 71 states have internal predecessors, (351), 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 20:05:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:33,507 INFO L93 Difference]: Finished difference Result 938 states and 1362 transitions. [2022-01-31 20:05:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 20:05:33,507 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 4.875) internal successors, (351), 71 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2022-01-31 20:05:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:33,509 INFO L225 Difference]: With dead ends: 938 [2022-01-31 20:05:33,510 INFO L226 Difference]: Without dead ends: 925 [2022-01-31 20:05:33,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2636, Invalid=2914, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:05:33,510 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3297 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3367 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:33,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3367 Valid, 832 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [731 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:05:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-01-31 20:05:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 503. [2022-01-31 20:05:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 497 states have (on average 1.4245472837022133) internal successors, (708), 497 states have internal predecessors, (708), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 713 transitions. [2022-01-31 20:05:33,899 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 713 transitions. Word has length 355 [2022-01-31 20:05:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:33,900 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 713 transitions. [2022-01-31 20:05:33,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 4.875) internal successors, (351), 71 states have internal predecessors, (351), 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 20:05:33,900 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 713 transitions. [2022-01-31 20:05:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-01-31 20:05:33,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:33,901 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:33,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 20:05:33,902 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:33,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:33,902 INFO L85 PathProgramCache]: Analyzing trace with hash 311512932, now seen corresponding path program 69 times [2022-01-31 20:05:33,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:33,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808457871] [2022-01-31 20:05:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:33,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:33,904 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:33,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:33,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:36,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:36,159 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:36,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808457871] [2022-01-31 20:05:36,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1808457871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:36,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:36,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 20:05:36,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714893023] [2022-01-31 20:05:36,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:36,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 20:05:36,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 20:05:36,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 20:05:36,162 INFO L87 Difference]: Start difference. First operand 503 states and 713 transitions. Second operand has 74 states, 73 states have (on average 4.876712328767123) internal successors, (356), 72 states have internal predecessors, (356), 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 20:05:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:46,205 INFO L93 Difference]: Finished difference Result 951 states and 1381 transitions. [2022-01-31 20:05:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 20:05:46,206 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 4.876712328767123) internal successors, (356), 72 states have internal predecessors, (356), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 360 [2022-01-31 20:05:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:46,208 INFO L225 Difference]: With dead ends: 951 [2022-01-31 20:05:46,208 INFO L226 Difference]: Without dead ends: 938 [2022-01-31 20:05:46,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2709, Invalid=2991, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 20:05:46,208 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3891 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3962 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 872 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:46,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3962 Valid, 846 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [872 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:05:46,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-01-31 20:05:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 510. [2022-01-31 20:05:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 504 states have (on average 1.4246031746031746) internal successors, (718), 504 states have internal predecessors, (718), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 723 transitions. [2022-01-31 20:05:46,605 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 723 transitions. Word has length 360 [2022-01-31 20:05:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:46,605 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 723 transitions. [2022-01-31 20:05:46,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 4.876712328767123) internal successors, (356), 72 states have internal predecessors, (356), 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 20:05:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 723 transitions. [2022-01-31 20:05:46,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-01-31 20:05:46,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:46,607 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:46,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 20:05:46,607 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1761783043, now seen corresponding path program 70 times [2022-01-31 20:05:46,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:46,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489920539] [2022-01-31 20:05:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:46,609 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:46,609 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:46,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:46,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:48,898 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:48,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489920539] [2022-01-31 20:05:48,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [489920539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:48,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:48,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 20:05:48,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981729007] [2022-01-31 20:05:48,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:48,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 20:05:48,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:48,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 20:05:48,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:05:48,901 INFO L87 Difference]: Start difference. First operand 510 states and 723 transitions. Second operand has 75 states, 74 states have (on average 4.878378378378378) internal successors, (361), 73 states have internal predecessors, (361), 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 20:05:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:59,240 INFO L93 Difference]: Finished difference Result 964 states and 1400 transitions. [2022-01-31 20:05:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 20:05:59,240 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 4.878378378378378) internal successors, (361), 73 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 365 [2022-01-31 20:05:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:59,242 INFO L225 Difference]: With dead ends: 964 [2022-01-31 20:05:59,242 INFO L226 Difference]: Without dead ends: 951 [2022-01-31 20:05:59,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2783, Invalid=3069, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 20:05:59,243 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2760 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2832 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:59,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2832 Valid, 863 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:05:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-01-31 20:05:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 517. [2022-01-31 20:05:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 511 states have (on average 1.4246575342465753) internal successors, (728), 511 states have internal predecessors, (728), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:05:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 733 transitions. [2022-01-31 20:05:59,650 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 733 transitions. Word has length 365 [2022-01-31 20:05:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:59,650 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 733 transitions. [2022-01-31 20:05:59,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 4.878378378378378) internal successors, (361), 73 states have internal predecessors, (361), 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 20:05:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 733 transitions. [2022-01-31 20:05:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-01-31 20:05:59,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:59,652 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:59,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 20:05:59,652 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:59,652 INFO L85 PathProgramCache]: Analyzing trace with hash 859175620, now seen corresponding path program 71 times [2022-01-31 20:05:59,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:59,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416574600] [2022-01-31 20:05:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:59,654 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:59,654 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:59,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:59,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:01,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:01,993 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:01,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416574600] [2022-01-31 20:06:01,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1416574600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:01,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:01,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 20:06:01,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462951198] [2022-01-31 20:06:01,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:01,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 20:06:01,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:01,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 20:06:01,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 20:06:01,996 INFO L87 Difference]: Start difference. First operand 517 states and 733 transitions. Second operand has 76 states, 75 states have (on average 4.88) internal successors, (366), 74 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:12,859 INFO L93 Difference]: Finished difference Result 977 states and 1419 transitions. [2022-01-31 20:06:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 20:06:12,859 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.88) internal successors, (366), 74 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 370 [2022-01-31 20:06:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:12,861 INFO L225 Difference]: With dead ends: 977 [2022-01-31 20:06:12,861 INFO L226 Difference]: Without dead ends: 964 [2022-01-31 20:06:12,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2858, Invalid=3148, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 20:06:12,862 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3289 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3362 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:12,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3362 Valid, 871 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:06:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-01-31 20:06:13,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 524. [2022-01-31 20:06:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 518 states have (on average 1.4247104247104247) internal successors, (738), 518 states have internal predecessors, (738), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:06:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 743 transitions. [2022-01-31 20:06:13,315 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 743 transitions. Word has length 370 [2022-01-31 20:06:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:13,315 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 743 transitions. [2022-01-31 20:06:13,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.88) internal successors, (366), 74 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 743 transitions. [2022-01-31 20:06:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 20:06:13,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:13,317 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:13,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 20:06:13,317 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:13,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:13,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2137136547, now seen corresponding path program 72 times [2022-01-31 20:06:13,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:13,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102170842] [2022-01-31 20:06:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:13,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:13,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:13,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:13,328 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:15,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:15,738 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:15,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102170842] [2022-01-31 20:06:15,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [102170842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:15,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:15,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 20:06:15,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121777439] [2022-01-31 20:06:15,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:15,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 20:06:15,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:15,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 20:06:15,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 20:06:15,741 INFO L87 Difference]: Start difference. First operand 524 states and 743 transitions. Second operand has 77 states, 76 states have (on average 4.881578947368421) internal successors, (371), 75 states have internal predecessors, (371), 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 20:06:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:27,108 INFO L93 Difference]: Finished difference Result 990 states and 1438 transitions. [2022-01-31 20:06:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 20:06:27,108 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 4.881578947368421) internal successors, (371), 75 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2022-01-31 20:06:27,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:27,110 INFO L225 Difference]: With dead ends: 990 [2022-01-31 20:06:27,110 INFO L226 Difference]: Without dead ends: 977 [2022-01-31 20:06:27,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2934, Invalid=3228, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 20:06:27,110 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2903 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2977 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:27,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2977 Valid, 890 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:06:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-01-31 20:06:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 531. [2022-01-31 20:06:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 525 states have (on average 1.4247619047619047) internal successors, (748), 525 states have internal predecessors, (748), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:06:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 753 transitions. [2022-01-31 20:06:27,537 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 753 transitions. Word has length 375 [2022-01-31 20:06:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:27,537 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 753 transitions. [2022-01-31 20:06:27,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 4.881578947368421) internal successors, (371), 75 states have internal predecessors, (371), 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 20:06:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 753 transitions. [2022-01-31 20:06:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-01-31 20:06:27,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:27,539 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:27,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 20:06:27,539 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1879305764, now seen corresponding path program 73 times [2022-01-31 20:06:27,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:27,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280745298] [2022-01-31 20:06:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:27,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:27,542 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:27,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:27,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:30,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:30,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:30,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280745298] [2022-01-31 20:06:30,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280745298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:30,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:30,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 20:06:30,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823363837] [2022-01-31 20:06:30,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:30,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 20:06:30,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:30,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 20:06:30,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 20:06:30,026 INFO L87 Difference]: Start difference. First operand 531 states and 753 transitions. Second operand has 78 states, 77 states have (on average 4.883116883116883) internal successors, (376), 76 states have internal predecessors, (376), 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 20:06:41,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:41,972 INFO L93 Difference]: Finished difference Result 1003 states and 1457 transitions. [2022-01-31 20:06:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 20:06:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 4.883116883116883) internal successors, (376), 76 states have internal predecessors, (376), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 380 [2022-01-31 20:06:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:41,974 INFO L225 Difference]: With dead ends: 1003 [2022-01-31 20:06:41,974 INFO L226 Difference]: Without dead ends: 990 [2022-01-31 20:06:41,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3011, Invalid=3309, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 20:06:41,975 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2898 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2973 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:41,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2973 Valid, 883 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:06:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-01-31 20:06:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 538. [2022-01-31 20:06:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 532 states have (on average 1.4248120300751879) internal successors, (758), 532 states have internal predecessors, (758), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:06:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 763 transitions. [2022-01-31 20:06:42,493 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 763 transitions. Word has length 380 [2022-01-31 20:06:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:42,493 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 763 transitions. [2022-01-31 20:06:42,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 4.883116883116883) internal successors, (376), 76 states have internal predecessors, (376), 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 20:06:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 763 transitions. [2022-01-31 20:06:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-01-31 20:06:42,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:42,495 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:42,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 20:06:42,495 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2010823101, now seen corresponding path program 74 times [2022-01-31 20:06:42,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:42,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036552733] [2022-01-31 20:06:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:42,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:42,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:42,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:42,506 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:44,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:44,999 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 20:06:44,999 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:45,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036552733] [2022-01-31 20:06:45,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2036552733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:45,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:45,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 20:06:45,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530398418] [2022-01-31 20:06:45,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:45,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 20:06:45,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 20:06:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 20:06:45,002 INFO L87 Difference]: Start difference. First operand 538 states and 763 transitions. Second operand has 79 states, 78 states have (on average 4.884615384615385) internal successors, (381), 77 states have internal predecessors, (381), 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 20:06:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:57,384 INFO L93 Difference]: Finished difference Result 1016 states and 1476 transitions. [2022-01-31 20:06:57,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 20:06:57,387 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 4.884615384615385) internal successors, (381), 77 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 385 [2022-01-31 20:06:57,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:57,390 INFO L225 Difference]: With dead ends: 1016 [2022-01-31 20:06:57,390 INFO L226 Difference]: Without dead ends: 1003 [2022-01-31 20:06:57,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3089, Invalid=3391, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 20:06:57,391 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3460 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 770 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3536 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:57,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3536 Valid, 906 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:06:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-01-31 20:06:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 545. [2022-01-31 20:06:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 539 states have (on average 1.424860853432282) internal successors, (768), 539 states have internal predecessors, (768), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:06:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 773 transitions. [2022-01-31 20:06:57,881 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 773 transitions. Word has length 385 [2022-01-31 20:06:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:57,881 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 773 transitions. [2022-01-31 20:06:57,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 4.884615384615385) internal successors, (381), 77 states have internal predecessors, (381), 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 20:06:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 773 transitions. [2022-01-31 20:06:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-31 20:06:57,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:57,883 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:57,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 20:06:57,883 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:57,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:57,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1140774524, now seen corresponding path program 75 times [2022-01-31 20:06:57,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:57,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831534164] [2022-01-31 20:06:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:57,885 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:57,885 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:57,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:57,894 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:00,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:00,469 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:00,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831534164] [2022-01-31 20:07:00,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [831534164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:00,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:00,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 20:07:00,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379926534] [2022-01-31 20:07:00,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:00,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 20:07:00,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:00,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 20:07:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 20:07:00,471 INFO L87 Difference]: Start difference. First operand 545 states and 773 transitions. Second operand has 80 states, 79 states have (on average 4.886075949367089) internal successors, (386), 78 states have internal predecessors, (386), 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 20:07:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:13,417 INFO L93 Difference]: Finished difference Result 1029 states and 1495 transitions. [2022-01-31 20:07:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 20:07:13,417 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 4.886075949367089) internal successors, (386), 78 states have internal predecessors, (386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 390 [2022-01-31 20:07:13,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:13,419 INFO L225 Difference]: With dead ends: 1029 [2022-01-31 20:07:13,419 INFO L226 Difference]: Without dead ends: 1016 [2022-01-31 20:07:13,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3168, Invalid=3474, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 20:07:13,420 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2786 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2863 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:13,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2863 Valid, 912 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:07:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-31 20:07:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 552. [2022-01-31 20:07:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 546 states have (on average 1.424908424908425) internal successors, (778), 546 states have internal predecessors, (778), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:07:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 783 transitions. [2022-01-31 20:07:13,994 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 783 transitions. Word has length 390 [2022-01-31 20:07:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:13,994 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 783 transitions. [2022-01-31 20:07:13,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 4.886075949367089) internal successors, (386), 78 states have internal predecessors, (386), 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 20:07:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 783 transitions. [2022-01-31 20:07:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-01-31 20:07:13,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:13,996 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:13,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 20:07:13,997 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2079971613, now seen corresponding path program 76 times [2022-01-31 20:07:13,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:13,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691902822] [2022-01-31 20:07:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:13,999 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:13,999 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:13,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:14,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:16,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:16,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:16,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691902822] [2022-01-31 20:07:16,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [691902822] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:16,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:16,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 20:07:16,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292029374] [2022-01-31 20:07:16,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:16,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 20:07:16,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 20:07:16,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 20:07:16,658 INFO L87 Difference]: Start difference. First operand 552 states and 783 transitions. Second operand has 81 states, 80 states have (on average 4.8875) internal successors, (391), 79 states have internal predecessors, (391), 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 20:07:29,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:29,991 INFO L93 Difference]: Finished difference Result 1042 states and 1514 transitions. [2022-01-31 20:07:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 20:07:29,992 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 4.8875) internal successors, (391), 79 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2022-01-31 20:07:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:29,993 INFO L225 Difference]: With dead ends: 1042 [2022-01-31 20:07:29,993 INFO L226 Difference]: Without dead ends: 1029 [2022-01-31 20:07:29,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3248, Invalid=3558, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 20:07:29,994 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2927 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3005 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:29,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3005 Valid, 933 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:07:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-01-31 20:07:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 559. [2022-01-31 20:07:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 553 states have (on average 1.4249547920433996) internal successors, (788), 553 states have internal predecessors, (788), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:07:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 793 transitions. [2022-01-31 20:07:30,476 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 793 transitions. Word has length 395 [2022-01-31 20:07:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:30,476 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 793 transitions. [2022-01-31 20:07:30,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 4.8875) internal successors, (391), 79 states have internal predecessors, (391), 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 20:07:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 793 transitions. [2022-01-31 20:07:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-01-31 20:07:30,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:30,478 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:30,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 20:07:30,478 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:30,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2058595556, now seen corresponding path program 77 times [2022-01-31 20:07:30,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:30,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502199122] [2022-01-31 20:07:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:30,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:30,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:30,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:30,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:33,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:33,195 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502199122] [2022-01-31 20:07:33,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502199122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:33,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:33,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 20:07:33,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252759553] [2022-01-31 20:07:33,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:33,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 20:07:33,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:33,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 20:07:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 20:07:33,198 INFO L87 Difference]: Start difference. First operand 559 states and 793 transitions. Second operand has 82 states, 81 states have (on average 4.888888888888889) internal successors, (396), 80 states have internal predecessors, (396), 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 20:07:47,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:47,336 INFO L93 Difference]: Finished difference Result 1055 states and 1533 transitions. [2022-01-31 20:07:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 20:07:47,336 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 4.888888888888889) internal successors, (396), 80 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 400 [2022-01-31 20:07:47,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:47,338 INFO L225 Difference]: With dead ends: 1055 [2022-01-31 20:07:47,338 INFO L226 Difference]: Without dead ends: 1042 [2022-01-31 20:07:47,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3329, Invalid=3643, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 20:07:47,339 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4077 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4156 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:47,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4156 Valid, 927 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:07:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-01-31 20:07:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 566. [2022-01-31 20:07:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 560 states have (on average 1.425) internal successors, (798), 560 states have internal predecessors, (798), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:07:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 803 transitions. [2022-01-31 20:07:47,859 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 803 transitions. Word has length 400 [2022-01-31 20:07:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:47,860 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 803 transitions. [2022-01-31 20:07:47,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 4.888888888888889) internal successors, (396), 80 states have internal predecessors, (396), 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 20:07:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 803 transitions. [2022-01-31 20:07:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-01-31 20:07:47,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:47,862 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:47,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 20:07:47,862 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:47,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:47,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1396621187, now seen corresponding path program 78 times [2022-01-31 20:07:47,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:47,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435920680] [2022-01-31 20:07:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:47,864 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:47,864 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:47,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:47,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:50,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:50,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:50,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435920680] [2022-01-31 20:07:50,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [435920680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:50,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:50,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 20:07:50,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309721885] [2022-01-31 20:07:50,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:50,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 20:07:50,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:50,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 20:07:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 20:07:50,702 INFO L87 Difference]: Start difference. First operand 566 states and 803 transitions. Second operand has 83 states, 82 states have (on average 4.890243902439025) internal successors, (401), 81 states have internal predecessors, (401), 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 20:08:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:05,446 INFO L93 Difference]: Finished difference Result 1068 states and 1552 transitions. [2022-01-31 20:08:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 20:08:05,446 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 4.890243902439025) internal successors, (401), 81 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 405 [2022-01-31 20:08:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:05,448 INFO L225 Difference]: With dead ends: 1068 [2022-01-31 20:08:05,448 INFO L226 Difference]: Without dead ends: 1055 [2022-01-31 20:08:05,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3411, Invalid=3729, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 20:08:05,449 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2871 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2951 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:05,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2951 Valid, 951 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [699 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:08:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-01-31 20:08:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 573. [2022-01-31 20:08:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 567 states have (on average 1.4250440917107583) internal successors, (808), 567 states have internal predecessors, (808), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:08:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 813 transitions. [2022-01-31 20:08:06,019 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 813 transitions. Word has length 405 [2022-01-31 20:08:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:06,020 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 813 transitions. [2022-01-31 20:08:06,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 4.890243902439025) internal successors, (401), 81 states have internal predecessors, (401), 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 20:08:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 813 transitions. [2022-01-31 20:08:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-01-31 20:08:06,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:06,021 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:06,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 20:08:06,022 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:06,022 INFO L85 PathProgramCache]: Analyzing trace with hash -534677436, now seen corresponding path program 79 times [2022-01-31 20:08:06,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:06,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821379074] [2022-01-31 20:08:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:06,024 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:08:06,024 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:08:06,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:06,035 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:08,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:08:08,835 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:08,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821379074] [2022-01-31 20:08:08,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1821379074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:08,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:08,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 20:08:08,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937288373] [2022-01-31 20:08:08,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:08,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 20:08:08,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:08,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 20:08:08,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 20:08:08,837 INFO L87 Difference]: Start difference. First operand 573 states and 813 transitions. Second operand has 84 states, 83 states have (on average 4.891566265060241) internal successors, (406), 82 states have internal predecessors, (406), 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 20:08:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:24,137 INFO L93 Difference]: Finished difference Result 1081 states and 1571 transitions. [2022-01-31 20:08:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 20:08:24,138 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 4.891566265060241) internal successors, (406), 82 states have internal predecessors, (406), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 410 [2022-01-31 20:08:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:24,139 INFO L225 Difference]: With dead ends: 1081 [2022-01-31 20:08:24,140 INFO L226 Difference]: Without dead ends: 1068 [2022-01-31 20:08:24,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3494, Invalid=3816, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 20:08:24,140 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3339 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 738 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:24,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3420 Valid, 964 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [738 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:08:24,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-01-31 20:08:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 580. [2022-01-31 20:08:24,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 574 states have (on average 1.4250871080139373) internal successors, (818), 574 states have internal predecessors, (818), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:08:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 823 transitions. [2022-01-31 20:08:24,686 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 823 transitions. Word has length 410 [2022-01-31 20:08:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:24,686 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 823 transitions. [2022-01-31 20:08:24,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 4.891566265060241) internal successors, (406), 82 states have internal predecessors, (406), 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 20:08:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 823 transitions. [2022-01-31 20:08:24,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-01-31 20:08:24,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:24,688 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:24,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 20:08:24,688 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1435045923, now seen corresponding path program 80 times [2022-01-31 20:08:24,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:24,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088921483] [2022-01-31 20:08:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:24,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:08:24,691 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:08:24,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:24,702 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:27,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:08:27,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088921483] [2022-01-31 20:08:27,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2088921483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:27,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:27,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 20:08:27,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139567137] [2022-01-31 20:08:27,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:27,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 20:08:27,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:27,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 20:08:27,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 20:08:27,572 INFO L87 Difference]: Start difference. First operand 580 states and 823 transitions. Second operand has 85 states, 84 states have (on average 4.892857142857143) internal successors, (411), 83 states have internal predecessors, (411), 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 20:08:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:43,735 INFO L93 Difference]: Finished difference Result 1094 states and 1590 transitions. [2022-01-31 20:08:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 20:08:43,736 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 4.892857142857143) internal successors, (411), 83 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 415 [2022-01-31 20:08:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:43,738 INFO L225 Difference]: With dead ends: 1094 [2022-01-31 20:08:43,738 INFO L226 Difference]: Without dead ends: 1081 [2022-01-31 20:08:43,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3578, Invalid=3904, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 20:08:43,739 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3709 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3791 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:43,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3791 Valid, 955 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:08:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2022-01-31 20:08:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 587. [2022-01-31 20:08:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 581 states have (on average 1.4251290877796903) internal successors, (828), 581 states have internal predecessors, (828), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:08:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 833 transitions. [2022-01-31 20:08:44,361 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 833 transitions. Word has length 415 [2022-01-31 20:08:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:44,361 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 833 transitions. [2022-01-31 20:08:44,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 4.892857142857143) internal successors, (411), 83 states have internal predecessors, (411), 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 20:08:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 833 transitions. [2022-01-31 20:08:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2022-01-31 20:08:44,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:44,363 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:44,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 20:08:44,363 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:44,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1355844516, now seen corresponding path program 81 times [2022-01-31 20:08:44,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:44,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588307205] [2022-01-31 20:08:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:44,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:08:44,366 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:08:44,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:44,378 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:47,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:08:47,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:47,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588307205] [2022-01-31 20:08:47,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588307205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:47,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:47,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 20:08:47,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69972448] [2022-01-31 20:08:47,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:47,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 20:08:47,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 20:08:47,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 20:08:47,309 INFO L87 Difference]: Start difference. First operand 587 states and 833 transitions. Second operand has 86 states, 85 states have (on average 4.894117647058824) internal successors, (416), 84 states have internal predecessors, (416), 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 20:09:04,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:09:04,100 INFO L93 Difference]: Finished difference Result 1107 states and 1609 transitions. [2022-01-31 20:09:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 20:09:04,101 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 4.894117647058824) internal successors, (416), 84 states have internal predecessors, (416), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 420 [2022-01-31 20:09:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:09:04,103 INFO L225 Difference]: With dead ends: 1107 [2022-01-31 20:09:04,103 INFO L226 Difference]: Without dead ends: 1094 [2022-01-31 20:09:04,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3663, Invalid=3993, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 20:09:04,104 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3564 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 790 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3647 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:09:04,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3647 Valid, 977 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:09:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-01-31 20:09:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 594. [2022-01-31 20:09:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 588 states have (on average 1.4251700680272108) internal successors, (838), 588 states have internal predecessors, (838), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:09:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 843 transitions. [2022-01-31 20:09:04,727 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 843 transitions. Word has length 420 [2022-01-31 20:09:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:09:04,728 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 843 transitions. [2022-01-31 20:09:04,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 4.894117647058824) internal successors, (416), 84 states have internal predecessors, (416), 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 20:09:04,728 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 843 transitions. [2022-01-31 20:09:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-01-31 20:09:04,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:09:04,730 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:09:04,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 20:09:04,731 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:09:04,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:09:04,731 INFO L85 PathProgramCache]: Analyzing trace with hash 169810115, now seen corresponding path program 82 times [2022-01-31 20:09:04,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:09:04,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293313302] [2022-01-31 20:09:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:09:04,733 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:09:04,733 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:09:04,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:09:04,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:09:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:07,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:09:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:09:07,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:09:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293313302] [2022-01-31 20:09:07,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1293313302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:09:07,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:09:07,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 20:09:07,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363701848] [2022-01-31 20:09:07,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:09:07,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 20:09:07,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:09:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 20:09:07,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 20:09:07,766 INFO L87 Difference]: Start difference. First operand 594 states and 843 transitions. Second operand has 87 states, 86 states have (on average 4.895348837209302) internal successors, (421), 85 states have internal predecessors, (421), 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 20:09:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:09:25,323 INFO L93 Difference]: Finished difference Result 1120 states and 1628 transitions. [2022-01-31 20:09:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 20:09:25,323 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 4.895348837209302) internal successors, (421), 85 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 425 [2022-01-31 20:09:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:09:25,325 INFO L225 Difference]: With dead ends: 1120 [2022-01-31 20:09:25,325 INFO L226 Difference]: Without dead ends: 1107 [2022-01-31 20:09:25,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3749, Invalid=4083, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 20:09:25,326 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3887 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3971 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:09:25,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3971 Valid, 1009 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:09:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-01-31 20:09:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 601. [2022-01-31 20:09:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 595 states have (on average 1.4252100840336135) internal successors, (848), 595 states have internal predecessors, (848), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:09:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 853 transitions. [2022-01-31 20:09:25,888 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 853 transitions. Word has length 425 [2022-01-31 20:09:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:09:25,889 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 853 transitions. [2022-01-31 20:09:25,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 4.895348837209302) internal successors, (421), 85 states have internal predecessors, (421), 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 20:09:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 853 transitions. [2022-01-31 20:09:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-01-31 20:09:25,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:09:25,891 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:09:25,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 20:09:25,891 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:09:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:09:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1043929340, now seen corresponding path program 83 times [2022-01-31 20:09:25,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:09:25,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311770079] [2022-01-31 20:09:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:09:25,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:09:25,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:09:25,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:09:25,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:09:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:29,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:09:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:09:29,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:09:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311770079] [2022-01-31 20:09:29,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [311770079] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:09:29,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:09:29,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 20:09:29,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705908092] [2022-01-31 20:09:29,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:09:29,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 20:09:29,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:09:29,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 20:09:29,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 20:09:29,067 INFO L87 Difference]: Start difference. First operand 601 states and 853 transitions. Second operand has 88 states, 87 states have (on average 4.896551724137931) internal successors, (426), 86 states have internal predecessors, (426), 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 20:09:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:09:47,413 INFO L93 Difference]: Finished difference Result 1133 states and 1647 transitions. [2022-01-31 20:09:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 20:09:47,414 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 4.896551724137931) internal successors, (426), 86 states have internal predecessors, (426), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 430 [2022-01-31 20:09:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:09:47,416 INFO L225 Difference]: With dead ends: 1133 [2022-01-31 20:09:47,416 INFO L226 Difference]: Without dead ends: 1120 [2022-01-31 20:09:47,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3836, Invalid=4174, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 20:09:47,417 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3861 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3946 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:09:47,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3946 Valid, 1005 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:09:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-01-31 20:09:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 608. [2022-01-31 20:09:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 602 states have (on average 1.4252491694352158) internal successors, (858), 602 states have internal predecessors, (858), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:09:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 863 transitions. [2022-01-31 20:09:48,079 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 863 transitions. Word has length 430 [2022-01-31 20:09:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:09:48,079 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 863 transitions. [2022-01-31 20:09:48,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 4.896551724137931) internal successors, (426), 86 states have internal predecessors, (426), 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 20:09:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 863 transitions. [2022-01-31 20:09:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 20:09:48,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:09:48,081 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:09:48,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 20:09:48,081 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:09:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:09:48,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1346709149, now seen corresponding path program 84 times [2022-01-31 20:09:48,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:09:48,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044634771] [2022-01-31 20:09:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:09:48,083 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:09:48,083 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:09:48,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:09:48,095 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:09:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:51,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:09:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:51,247 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 20:09:51,247 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:09:51,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044634771] [2022-01-31 20:09:51,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044634771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:09:51,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:09:51,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 20:09:51,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965565744] [2022-01-31 20:09:51,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:09:51,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 20:09:51,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:09:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 20:09:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 20:09:51,249 INFO L87 Difference]: Start difference. First operand 608 states and 863 transitions. Second operand has 89 states, 88 states have (on average 4.8977272727272725) internal successors, (431), 87 states have internal predecessors, (431), 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 20:10:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:10:10,571 INFO L93 Difference]: Finished difference Result 1146 states and 1666 transitions. [2022-01-31 20:10:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 20:10:10,572 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 4.8977272727272725) internal successors, (431), 87 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2022-01-31 20:10:10,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:10:10,574 INFO L225 Difference]: With dead ends: 1146 [2022-01-31 20:10:10,574 INFO L226 Difference]: Without dead ends: 1133 [2022-01-31 20:10:10,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3924, Invalid=4266, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 20:10:10,574 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3574 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3660 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:10:10,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3660 Valid, 1033 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:10:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-01-31 20:10:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 615. [2022-01-31 20:10:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 609 states have (on average 1.4252873563218391) internal successors, (868), 609 states have internal predecessors, (868), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:10:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 873 transitions. [2022-01-31 20:10:11,178 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 873 transitions. Word has length 435 [2022-01-31 20:10:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:10:11,179 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 873 transitions. [2022-01-31 20:10:11,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 4.8977272727272725) internal successors, (431), 87 states have internal predecessors, (431), 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 20:10:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 873 transitions. [2022-01-31 20:10:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-01-31 20:10:11,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:10:11,181 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:10:11,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 20:10:11,181 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:10:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:10:11,181 INFO L85 PathProgramCache]: Analyzing trace with hash 411732580, now seen corresponding path program 85 times [2022-01-31 20:10:11,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:10:11,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337706315] [2022-01-31 20:10:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:10:11,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:10:11,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:10:11,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:10:11,195 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:10:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:10:14,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:10:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:10:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:10:14,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:10:14,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337706315] [2022-01-31 20:10:14,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [337706315] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:10:14,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:10:14,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 20:10:14,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130121064] [2022-01-31 20:10:14,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:10:14,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 20:10:14,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:10:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 20:10:14,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 20:10:14,408 INFO L87 Difference]: Start difference. First operand 615 states and 873 transitions. Second operand has 90 states, 89 states have (on average 4.898876404494382) internal successors, (436), 88 states have internal predecessors, (436), 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 20:10:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:10:34,224 INFO L93 Difference]: Finished difference Result 1159 states and 1685 transitions. [2022-01-31 20:10:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 20:10:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 4.898876404494382) internal successors, (436), 88 states have internal predecessors, (436), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 440 [2022-01-31 20:10:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:10:34,226 INFO L225 Difference]: With dead ends: 1159 [2022-01-31 20:10:34,226 INFO L226 Difference]: Without dead ends: 1146 [2022-01-31 20:10:34,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4013, Invalid=4359, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 20:10:34,227 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3385 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3472 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 817 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:10:34,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3472 Valid, 1051 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [817 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:10:34,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-01-31 20:10:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 622. [2022-01-31 20:10:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 616 states have (on average 1.4253246753246753) internal successors, (878), 616 states have internal predecessors, (878), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:10:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 883 transitions. [2022-01-31 20:10:34,844 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 883 transitions. Word has length 440 [2022-01-31 20:10:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:10:34,844 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 883 transitions. [2022-01-31 20:10:34,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 4.898876404494382) internal successors, (436), 88 states have internal predecessors, (436), 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 20:10:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 883 transitions. [2022-01-31 20:10:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2022-01-31 20:10:34,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:10:34,846 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:10:34,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 20:10:34,846 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:10:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:10:34,847 INFO L85 PathProgramCache]: Analyzing trace with hash -459910653, now seen corresponding path program 86 times [2022-01-31 20:10:34,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:10:34,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133897883] [2022-01-31 20:10:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:10:34,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:10:34,849 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:10:34,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:10:34,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:10:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:10:38,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:10:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:10:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:10:38,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:10:38,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133897883] [2022-01-31 20:10:38,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133897883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:10:38,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:10:38,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 20:10:38,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139299179] [2022-01-31 20:10:38,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:10:38,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 20:10:38,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:10:38,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 20:10:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 20:10:38,155 INFO L87 Difference]: Start difference. First operand 622 states and 883 transitions. Second operand has 91 states, 90 states have (on average 4.9) internal successors, (441), 89 states have internal predecessors, (441), 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 20:10:58,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:10:58,812 INFO L93 Difference]: Finished difference Result 1172 states and 1704 transitions. [2022-01-31 20:10:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 20:10:58,815 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 4.9) internal successors, (441), 89 states have internal predecessors, (441), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 445 [2022-01-31 20:10:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:10:58,817 INFO L225 Difference]: With dead ends: 1172 [2022-01-31 20:10:58,817 INFO L226 Difference]: Without dead ends: 1159 [2022-01-31 20:10:58,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4103, Invalid=4453, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:10:58,818 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3461 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3549 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:10:58,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3549 Valid, 1043 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:10:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-01-31 20:10:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 629. [2022-01-31 20:10:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 623 states have (on average 1.4253611556982344) internal successors, (888), 623 states have internal predecessors, (888), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:10:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 893 transitions. [2022-01-31 20:10:59,431 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 893 transitions. Word has length 445 [2022-01-31 20:10:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:10:59,431 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 893 transitions. [2022-01-31 20:10:59,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 4.9) internal successors, (441), 89 states have internal predecessors, (441), 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 20:10:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 893 transitions. [2022-01-31 20:10:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2022-01-31 20:10:59,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:10:59,433 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:10:59,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 20:10:59,433 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:10:59,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:10:59,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1960741436, now seen corresponding path program 87 times [2022-01-31 20:10:59,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:10:59,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197456689] [2022-01-31 20:10:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:10:59,436 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:10:59,436 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:10:59,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:10:59,451 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:10:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:11:02,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:11:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:11:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:11:02,803 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:11:02,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197456689] [2022-01-31 20:11:02,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [197456689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:11:02,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:11:02,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 20:11:02,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198514255] [2022-01-31 20:11:02,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:11:02,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 20:11:02,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:11:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 20:11:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 20:11:02,806 INFO L87 Difference]: Start difference. First operand 629 states and 893 transitions. Second operand has 92 states, 91 states have (on average 4.9010989010989015) internal successors, (446), 90 states have internal predecessors, (446), 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 20:11:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:11:23,906 INFO L93 Difference]: Finished difference Result 1185 states and 1723 transitions. [2022-01-31 20:11:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 20:11:23,906 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 4.9010989010989015) internal successors, (446), 90 states have internal predecessors, (446), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 450 [2022-01-31 20:11:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:11:23,908 INFO L225 Difference]: With dead ends: 1185 [2022-01-31 20:11:23,908 INFO L226 Difference]: Without dead ends: 1172 [2022-01-31 20:11:23,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4194, Invalid=4548, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 20:11:23,909 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4063 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 899 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4152 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 2067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 899 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:11:23,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4152 Valid, 1068 Invalid, 2067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [899 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:11:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-01-31 20:11:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 636. [2022-01-31 20:11:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 630 states have (on average 1.4253968253968254) internal successors, (898), 630 states have internal predecessors, (898), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:11:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 903 transitions. [2022-01-31 20:11:24,539 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 903 transitions. Word has length 450 [2022-01-31 20:11:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:11:24,540 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 903 transitions. [2022-01-31 20:11:24,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 4.9010989010989015) internal successors, (446), 90 states have internal predecessors, (446), 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 20:11:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 903 transitions. [2022-01-31 20:11:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-01-31 20:11:24,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:11:24,542 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:11:24,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 20:11:24,542 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:11:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:11:24,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1181450915, now seen corresponding path program 88 times [2022-01-31 20:11:24,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:11:24,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880413546] [2022-01-31 20:11:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:11:24,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:11:24,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:11:24,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:11:24,557 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:11:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:11:27,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:11:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:11:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:11:27,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:11:27,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880413546] [2022-01-31 20:11:27,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [880413546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:11:27,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:11:27,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 20:11:27,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584116719] [2022-01-31 20:11:27,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:11:27,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 20:11:27,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:11:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 20:11:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:11:27,970 INFO L87 Difference]: Start difference. First operand 636 states and 903 transitions. Second operand has 93 states, 92 states have (on average 4.9021739130434785) internal successors, (451), 91 states have internal predecessors, (451), 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 20:11:49,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:11:49,773 INFO L93 Difference]: Finished difference Result 1198 states and 1742 transitions. [2022-01-31 20:11:49,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 20:11:49,773 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 4.9021739130434785) internal successors, (451), 91 states have internal predecessors, (451), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-01-31 20:11:49,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:11:49,775 INFO L225 Difference]: With dead ends: 1198 [2022-01-31 20:11:49,775 INFO L226 Difference]: Without dead ends: 1185 [2022-01-31 20:11:49,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4286, Invalid=4644, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:11:49,776 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4650 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 1111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4740 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1111 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:11:49,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4740 Valid, 1062 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1111 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:11:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-01-31 20:11:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 643. [2022-01-31 20:11:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 637 states have (on average 1.4254317111459969) internal successors, (908), 637 states have internal predecessors, (908), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:11:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 913 transitions. [2022-01-31 20:11:50,422 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 913 transitions. Word has length 455 [2022-01-31 20:11:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:11:50,422 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 913 transitions. [2022-01-31 20:11:50,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 4.9021739130434785) internal successors, (451), 91 states have internal predecessors, (451), 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 20:11:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 913 transitions. [2022-01-31 20:11:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-01-31 20:11:50,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:11:50,425 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:11:50,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 20:11:50,425 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:11:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:11:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1157412, now seen corresponding path program 89 times [2022-01-31 20:11:50,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:11:50,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221949353] [2022-01-31 20:11:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:11:50,427 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:11:50,427 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:11:50,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:11:50,445 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:11:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:11:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:11:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:11:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:11:53,925 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:11:53,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221949353] [2022-01-31 20:11:53,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [221949353] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:11:53,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:11:53,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 20:11:53,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861767387] [2022-01-31 20:11:53,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:11:53,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 20:11:53,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:11:53,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 20:11:53,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 20:11:53,927 INFO L87 Difference]: Start difference. First operand 643 states and 913 transitions. Second operand has 94 states, 93 states have (on average 4.903225806451613) internal successors, (456), 92 states have internal predecessors, (456), 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 20:12:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:12:16,906 INFO L93 Difference]: Finished difference Result 1211 states and 1761 transitions. [2022-01-31 20:12:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 20:12:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 4.903225806451613) internal successors, (456), 92 states have internal predecessors, (456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 460 [2022-01-31 20:12:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:12:16,908 INFO L225 Difference]: With dead ends: 1211 [2022-01-31 20:12:16,908 INFO L226 Difference]: Without dead ends: 1198 [2022-01-31 20:12:16,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4379, Invalid=4741, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 20:12:16,909 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4352 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 966 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4443 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 966 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:12:16,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4443 Valid, 1072 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [966 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:12:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-01-31 20:12:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 650. [2022-01-31 20:12:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 644 states have (on average 1.4254658385093169) internal successors, (918), 644 states have internal predecessors, (918), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:12:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 923 transitions. [2022-01-31 20:12:17,568 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 923 transitions. Word has length 460 [2022-01-31 20:12:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:12:17,568 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 923 transitions. [2022-01-31 20:12:17,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 4.903225806451613) internal successors, (456), 92 states have internal predecessors, (456), 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 20:12:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 923 transitions. [2022-01-31 20:12:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-01-31 20:12:17,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:12:17,571 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:12:17,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 20:12:17,572 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:12:17,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:12:17,572 INFO L85 PathProgramCache]: Analyzing trace with hash 309619523, now seen corresponding path program 90 times [2022-01-31 20:12:17,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:12:17,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554059651] [2022-01-31 20:12:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:12:17,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:12:17,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:12:17,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:12:17,592 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:12:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:12:21,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:12:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:12:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:12:21,142 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:12:21,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554059651] [2022-01-31 20:12:21,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554059651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:12:21,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:12:21,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 20:12:21,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076464685] [2022-01-31 20:12:21,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:12:21,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 20:12:21,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:12:21,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 20:12:21,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:12:21,144 INFO L87 Difference]: Start difference. First operand 650 states and 923 transitions. Second operand has 95 states, 94 states have (on average 4.904255319148936) internal successors, (461), 93 states have internal predecessors, (461), 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 20:12:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:12:44,407 INFO L93 Difference]: Finished difference Result 1224 states and 1780 transitions. [2022-01-31 20:12:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 20:12:44,407 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 4.904255319148936) internal successors, (461), 93 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 465 [2022-01-31 20:12:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:12:44,409 INFO L225 Difference]: With dead ends: 1224 [2022-01-31 20:12:44,409 INFO L226 Difference]: Without dead ends: 1211 [2022-01-31 20:12:44,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4473, Invalid=4839, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:12:44,409 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3955 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4047 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:12:44,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4047 Valid, 1079 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:12:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-01-31 20:12:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 657. [2022-01-31 20:12:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 651 states have (on average 1.4254992319508448) internal successors, (928), 651 states have internal predecessors, (928), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:12:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 933 transitions. [2022-01-31 20:12:45,084 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 933 transitions. Word has length 465 [2022-01-31 20:12:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:12:45,085 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 933 transitions. [2022-01-31 20:12:45,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 4.904255319148936) internal successors, (461), 93 states have internal predecessors, (461), 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 20:12:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 933 transitions. [2022-01-31 20:12:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-01-31 20:12:45,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:12:45,087 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:12:45,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 20:12:45,087 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:12:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:12:45,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1851860100, now seen corresponding path program 91 times [2022-01-31 20:12:45,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:12:45,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519188147] [2022-01-31 20:12:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:12:45,089 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:12:45,089 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:12:45,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:12:45,104 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:12:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:12:48,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:12:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:12:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:12:48,711 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:12:48,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519188147] [2022-01-31 20:12:48,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519188147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:12:48,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:12:48,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 20:12:48,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217520411] [2022-01-31 20:12:48,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:12:48,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 20:12:48,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:12:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 20:12:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 20:12:48,713 INFO L87 Difference]: Start difference. First operand 657 states and 933 transitions. Second operand has 96 states, 95 states have (on average 4.905263157894737) internal successors, (466), 94 states have internal predecessors, (466), 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 20:13:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:13:12,756 INFO L93 Difference]: Finished difference Result 1237 states and 1799 transitions. [2022-01-31 20:13:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 20:13:12,756 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.905263157894737) internal successors, (466), 94 states have internal predecessors, (466), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 470 [2022-01-31 20:13:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:13:12,758 INFO L225 Difference]: With dead ends: 1237 [2022-01-31 20:13:12,758 INFO L226 Difference]: Without dead ends: 1224 [2022-01-31 20:13:12,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4568, Invalid=4938, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 20:13:12,759 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3339 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:13:12,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3432 Valid, 1102 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:13:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-01-31 20:13:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 664. [2022-01-31 20:13:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 658 states have (on average 1.425531914893617) internal successors, (938), 658 states have internal predecessors, (938), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:13:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 943 transitions. [2022-01-31 20:13:13,472 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 943 transitions. Word has length 470 [2022-01-31 20:13:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:13:13,473 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 943 transitions. [2022-01-31 20:13:13,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.905263157894737) internal successors, (466), 94 states have internal predecessors, (466), 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 20:13:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 943 transitions. [2022-01-31 20:13:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-01-31 20:13:13,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:13:13,475 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:13:13,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 20:13:13,475 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:13:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:13:13,476 INFO L85 PathProgramCache]: Analyzing trace with hash -982840349, now seen corresponding path program 92 times [2022-01-31 20:13:13,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:13:13,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852098728] [2022-01-31 20:13:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:13:13,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:13:13,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:13:13,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:13:13,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:13:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:13:17,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:13:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:13:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:13:17,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:13:17,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852098728] [2022-01-31 20:13:17,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852098728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:13:17,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:13:17,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 20:13:17,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488267578] [2022-01-31 20:13:17,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:13:17,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 20:13:17,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:13:17,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 20:13:17,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:13:17,193 INFO L87 Difference]: Start difference. First operand 664 states and 943 transitions. Second operand has 97 states, 96 states have (on average 4.90625) internal successors, (471), 95 states have internal predecessors, (471), 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 20:13:42,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:13:42,447 INFO L93 Difference]: Finished difference Result 1250 states and 1818 transitions. [2022-01-31 20:13:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 20:13:42,448 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 4.90625) internal successors, (471), 95 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 475 [2022-01-31 20:13:42,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:13:42,449 INFO L225 Difference]: With dead ends: 1250 [2022-01-31 20:13:42,449 INFO L226 Difference]: Without dead ends: 1237 [2022-01-31 20:13:42,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4664, Invalid=5038, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:13:42,450 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3336 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 819 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3430 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 819 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:13:42,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3430 Valid, 1112 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [819 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:13:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-01-31 20:13:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 671. [2022-01-31 20:13:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 665 states have (on average 1.4255639097744361) internal successors, (948), 665 states have internal predecessors, (948), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:13:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 953 transitions. [2022-01-31 20:13:43,169 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 953 transitions. Word has length 475 [2022-01-31 20:13:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:13:43,169 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 953 transitions. [2022-01-31 20:13:43,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 4.90625) internal successors, (471), 95 states have internal predecessors, (471), 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 20:13:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 953 transitions. [2022-01-31 20:13:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-01-31 20:13:43,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:13:43,172 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:13:43,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 20:13:43,172 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:13:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:13:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1033234404, now seen corresponding path program 93 times [2022-01-31 20:13:43,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:13:43,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995215434] [2022-01-31 20:13:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:13:43,175 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:13:43,175 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:13:43,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:13:43,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:13:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:13:47,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:13:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:13:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:13:47,005 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:13:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995215434] [2022-01-31 20:13:47,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [995215434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:13:47,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:13:47,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 20:13:47,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769683935] [2022-01-31 20:13:47,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:13:47,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 20:13:47,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:13:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 20:13:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 20:13:47,008 INFO L87 Difference]: Start difference. First operand 671 states and 953 transitions. Second operand has 98 states, 97 states have (on average 4.907216494845361) internal successors, (476), 96 states have internal predecessors, (476), 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 20:14:13,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:14:13,348 INFO L93 Difference]: Finished difference Result 1263 states and 1837 transitions. [2022-01-31 20:14:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 20:14:13,349 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 4.907216494845361) internal successors, (476), 96 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 480 [2022-01-31 20:14:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:14:13,350 INFO L225 Difference]: With dead ends: 1263 [2022-01-31 20:14:13,350 INFO L226 Difference]: Without dead ends: 1250 [2022-01-31 20:14:13,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4761, Invalid=5139, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 20:14:13,351 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4587 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 1097 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4682 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1097 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:14:13,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4682 Valid, 1123 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1097 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:14:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-01-31 20:14:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 678. [2022-01-31 20:14:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 672 states have (on average 1.4255952380952381) internal successors, (958), 672 states have internal predecessors, (958), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 20:14:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 963 transitions. [2022-01-31 20:14:14,088 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 963 transitions. Word has length 480 [2022-01-31 20:14:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:14:14,089 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 963 transitions. [2022-01-31 20:14:14,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 4.907216494845361) internal successors, (476), 96 states have internal predecessors, (476), 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 20:14:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 963 transitions. [2022-01-31 20:14:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2022-01-31 20:14:14,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:14:14,091 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:14:14,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 20:14:14,091 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:14:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:14:14,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1148623741, now seen corresponding path program 94 times [2022-01-31 20:14:14,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:14:14,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958142660] [2022-01-31 20:14:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:14:14,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:14:14,094 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:14:14,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:14:14,108 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:14:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:14:17,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:14:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:14:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:14:17,928 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:14:17,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958142660] [2022-01-31 20:14:17,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [958142660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:14:17,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:14:17,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 20:14:17,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029068803] [2022-01-31 20:14:17,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:14:17,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 20:14:17,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:14:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 20:14:17,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:14:17,931 INFO L87 Difference]: Start difference. First operand 678 states and 963 transitions. Second operand has 99 states, 98 states have (on average 4.908163265306122) internal successors, (481), 97 states have internal predecessors, (481), 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)